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C U R R I C U L U M   V I T A E

ABSTRACT: Ioan-Iovitz POPESCU received the BS (1955) and PhD (1961) in physics from Bucharest University. He has been professor of plasma physics and optics with the Physics Faculty of the Bucharest University since 1955 and senior scientist with the Bucharest Physics Institute and the Institute of Atomic Physics at Bucharest-Magurele since 1960. He was with the Institute for Experimental Physics of the Kiel University on an Alexander von Humboldt research fellowship (1967-69), and then principal investigator, jointly with Professor Carl B. Collins of the University of Texas at Dallas, of the U.S.-Romanian Project in Atomic and Plasma Physics (1971-81). His fields of research specialization are electrical discharges in gases and plasma physics, atomic and molecular collisions and photo-processes, optogalvanic and multiphoton laser spectroscopy, plasma electron beam and x-ray sources, and gamma-ray induced emission. He was elected as a full member of the Romanian Academy in 1990 (corresponding member since 1974). In 1995 he became the director of the Romanian Center and Foundation on Induced Gamma Emission.
 
 

FIRST NAME: IOAN-IOVITZ

NICKNAME: IOVITZU

LAST NAME: POPESCU

BORN: October 1st, 1932, Burila-Mare, Mehedintzi county, Romania, son of Dumitru and Elvira (Iovitz) Popescu

MARRIED: August 10, 1963, Denisa-Georgeta Popescu (born Chiru), Ph.D. in physics, co-worker in 35 papers on optogalvanic and laser spectroscopy

EDUCATION:

• 1943-1951: Lyceum "Traian", Drobeta-Turnu Severin
• 1951-1955: Faculty of Physics of the Bucharest University, B.Sc.Thesis The Sodium Vapor Lamp under the supervision of Acad. Prof. Radu Grigorovici
• 1955-1975: Co-worker of Acad. Prof. Eugen Badareu in 13 papers and 3 books on gas discharge physics
• 1961, April 12: Doctoral degree in physics, Ph.D. Thesis On the Mechanism of Cathodic Parts of Glow Discharges under the supervision of Acad. Prof. Eugen Badareu
• 1967-1969: Post-Doctoral studies: Alexander von Humboldt Dozenten Stipendium at the Institut für Experimentalphysik der Universität Kiel, Germany, with Prof. Walter Lochte-Holtgreven and Prof. Johannes Richter

        CAREER:

• 1955-1960: Assistant for optics and gaseous electronics, Faculty of Physics of the Bucharest University
• 1960-1972: Head of the Plasma Physics Laboratory and, subsequently, scientific deputy director of the Institute of Physics at Bucharest
• 1972-: Professor of plasma physics and optics at the Faculty of Physics of the Bucharest University (since 1990 consulting professor)
• 1972-1977: Dean of the Faculty of Physics of the Bucharest University
• 1977-1981: Director of the Institute of Physics and Radiation Technology, Bucharest-Magurele
• May 1981-October 1989: Rector of the Bucharest University
• 1990-1992: President of the Physics Section and member of the Presidium of the Romanian Academy
• 1995-: Director of the Foundation RC-IGE "Romanian Center for Induced Gamma Emission"

        EXPERIENCE:

• 1969- : about 45 Supervised Ph.D. Dissertations in the field of plasma physics
• 1969: Secretary General of the IXth International Conference on Phenomena in Ionized Gases, Bucharest, September 1969 (the largest international scientific meeting ever held in Romania: about 800 participants from 32 countries)
• 1971-1981: Co-ordinator, with Prof. Carl Baxter Collins, Center for Quantum Electronics of the University of Texas at Dallas, of the joint U.S.-Romanian Project in Atomic and Plasma Physics, supported by the U.S. National Science Foundation under the grants GF 443 and INT 7618982
• 1972-1978: Member of the Plasma Commission of the International Union of Pure and Applied Physics (IUPAP)
• 1986- : Advisory Editor of Europhysics Letters, published by the European Physical Society
• 1991-2000: Editor-in-Chief of the Romanian Reports in Physics, published by the Romanian Academy
• 1995-: Member of the Superior Certifying Commission of the Education Ministry
• 1995: President of the Commission of the Romanian Academy Grants for Physics
• 1995-1997: Organizing Committee of the First NATO Advanced Research Workshop on Gamma-Ray Lasers, Predeal '95, and of the subsequent Workshops in Bucharest-Magurele '96 and Predeal '97
• 1996-2003: Principal investigator of several contracts (F61708-96-W0276; F61708-97-W0053; F61708-98-W0027; F61775-99-WE030; F61775-00-WE056; FA8655-02-1-3069) regarding induced gamma emission from isomeric nuclei, supported by US Air Force Office of Scientific Research (AFOSR) through its European Office of Aerospace Research and Development (EOARD)

        MAIN ACHIEVEMENTS:

• 14 books (ionized gases and plasma physics, optics and spectroscopy, general physics, with professors Eugen Badareu, Radu Titeica, Iancu Iova, Dumitru Ciobotaru, Emil Toader, Florea Uliu and Ion Dima) and over one hundred publications in reviewed journals on topics in gas discharges, plasma and laser physics (78 in foreign journals, 52 in Romanian Academy journals, and 55 in international conference proceedings), cited in over 1500 publications of authors from U.S.A. (50 %), Germany (14 %), Russia (13 %), France (7 %), England (6 %), and other countries (10 %)
• Original contributions in the field of electrical gas discharges and plasma physics as, for instance, in glow discharges (cathode fall theory, hollow-cathode effect), low voltage arcs (diffusion theory, thermionic diodes), elementary processes in plasmas (resonant charge transfer for positive ions, photoionization of alkali vapors).
• First experimental evidence of stable ion clusters with icosahedron and dodecahedron symmetry in ionized dense gases (with Dr. Rüdiger von der Heide, 1969)
• Introduction of the optogalvanic effect as a new principle for laser spectroscopy by thermionic detection (1964), radio-frequency detection (1980) and detection of laser-induced frequency shift of self-excited ion plasma oscillations (1990), with Acad. Prof. Eugen Badareu, Dr. Denisa Popescu, Prof. Dr. Johannes Richter, Prof. Dr. Carl B. Collins, Prof. Dr. C. Stanciulescu et al.
• First experimental evidence of multiphoton spectra of free atoms and molecules with tunable lasers (with Dr. Denisa Popescu and Prof. Dr. C.B. Collins, 1973-74)
• Discovery of hybrid resonances and state-selective laser photolysis of molecules (with Dr. Denisa Popescu and Prof. Dr. Carl B. Collins, 1974). This two-photon process involving hybrid molecular-atomic resonances appears to be the most efficient for the production of highly excited Rydberg atoms 
• Introduction of photolytic spectroscopy (with Dr. Denisa Popescu and Prof. Dr. Carl B. Collins, 1980) capable to investigate in detail the predissociation of neutral molecules, the form of the repulsive potential curves and the atomic dissociation states
• First demonstrations of the real possibilities of multiphoton spectroscopy (with Dr. Denisa Popescu and Prof. Dr Carl B. Collins, 1973-1981) which initiated the growth of the field of laser spectroscopy by Excited-State Spectroscopy, Rydberg Spectroscopy, Two-Photon Doppler-Free Spectroscopy, Multiphoton Ionization Spectroscopy and Photolytic Spectroscopy
• Pioneering project of optical pumping of gamma-ray lasers which ultimately launched the renaissance of the field (with Prof. Dr. C. B. Collins, Dr. S. Olariu, and Prof. Dr. M. Petrascu, 1979-1982)
• A thorough review of the experiments and theories on the Aharonov- Bohm effect (with Dr. S. Olariu), The Quantum Effects of  Electromagnetic Fluxes, Reviews of Modern Physics, 57, 339-436 (1985) 
• A new type of pseudospark plasma source of high intensity electron, ion, and electromagnetic beams and the discovery of the "cruising effect" of intense electron beams along dielectric surfaces (with Dr. M. Ganciu, Prof. Dr. Anne-Marie Pointu, Dr. N. B. Mandache et al., 1994), with major potential applications in high intensity X-ray sources, X-ray lasers, high density ion traps, in situ pumping of gamma-ray lasers, and electron beam- plasma-surface chemistry
• First experimental evidence of induced gamma emission of a longlived Hafnium-178 isomer showing a highly efficient X-rays to gamma-rays conversion (with Carl B. Collins et al., Phys. Rev. Lett., 82, 695 (1999); 84, 2544 (2000); Phys. Rev. C, 61, 054305(7) (18 April 2000); Phys. Atom. Nucl. (Yad. Fiz.), 63, 2067 (2000); Laser Phys., 11, 1-5 (2001); Hyper. Inter., volume in honor of Romain Coussement, accepted for publication (2001)

        PRIZES AN D HONORS:

• 1966: Prize "C.Miculescu" for Physics of the Romanian Academy
• 1974: Elected Corresponding Member of the Romanian Academy
• 1990: Elected Full Member of the Romanian Academy
• 1997: Honorary Citizen of the Mehedintzi county, Romania
• 1998: Doctor Honoris Causa of the University of Craiova, Romania
• 2000: Loyal Service National Order in Commander Rank, Romania
• 2002: Academic Merit awarded by the Romanian Academy

See more information on research partnerships at URL's:

• UNIVERSITY OF TEXAS AT DALLAS - CENTER FOR QUANTUM ELECTRONICS

 
• UNIVERSITE PARIS SUD - LABORATOIRE DES PHYSIQUE DE GAS ET DES PLASMAS (LPGP)

 
• INSTITUTE OF ATOMIC PHYSICS - LOW TEMPERATURE PLASMA DEPARTMENT

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SUPERVISED Ph.D. DISSERTATIONS IN PLASMA PHYSICS

(square brackets mean transfer to another supervisor)

• 1. Andrei IONESCU, 1973, Bucharest Univ., Contributions to the Study of Negative Labile Molecular Ions; 
• 2. Mihail-Lucian PASCU, 1975, Bucharest Univ., Optical Study of Molecular Ions in Plasma; 
• 3. Theodor IONESCU-BUJOR, 1979, Bucharest Univ., Spectroscopic Study of Transient Plasmas Generated in Coaxial Accelerators; 
• 4. Alexandra-Ana BALTOG, 1979, Bucharest Univ., Contributions to the Study of Physical Processes in Cesium and Cesium-Noble Gas Plasmas; 
• 5. Marcel Corneliu DOBRE, 1980, Bucharest Univ., Contributions to the Mechanism of the Hollow-Cathode Effect in Glow Discharges; 
• 6. Bogdan Nicolae MANDACHE, 1981, Bucharest Univ., The Dynamics of Charge Carriers in Focalized Plasmas. Diagnostics Methods of the Ionic Component; 
• 7. Ion MUSTATA, 1981, Bucharest Univ., Contributions to the Physical Processes in Low Temperature Plasmas; 
• 8. Razvan BOBULESCU, 1981, Bucharest Univ., Contributions to the Absorption Spectroscopy with Tunable Lasers; 
• 9. Cipriana-Corina MANDACHE, 1982, Bucharest Univ., The Study of Relaxation Processes in the Hydrogen Maser as Frequency-Time Standard; 
• 10. Silviu OLARIU, 1983, Bucharest Univ., The Meaning of the Electromagnetic Potentials in Quantum Mechanics; 
• 11. Ani SURMEIAN, 1987, Bucharest Univ., Tunable Laser Spectroscopy; 
• 12. Constantin-Liviu GIURGIU, 1987, Bucharest Univ., Environmental Perturbing Effects on the Working of Hydrogen Maser as Primary Frequency-Time Standard; 
• 13. Dragos FALIE, 1987, Bucharest Univ., Ultrafast Electrono-Optical Recording System for the Investigation of Luminous Phenomena Occurring in Hydrogen Plasmas; 
• 14. Maria-Antoaneta BRATESCU, 1987, Bucharest Univ., Study of the Laser-Plasma Interaction by Optogalvanic Effect; 
• 15. Andrei BELEA, 1987, Bucharest Univ., Relativistic Optical Effects in Laser and Plasma Physics; 
• 16. Gheorghe DINESCU, 1987, Bucharest Univ., Contributions to the Study of Plasma Flowing Processes by Electrical Measurements and Spectral Investigation at Visible and Ultraviolet Wavelength Ranges; 
• 17. Vania COVLEA, 1987, Bucharest Univ., Contributions to the Study of Physical Processes Occurring in the Noble Gas Plasma; 
• 18. Viorel ZAMBREANU, 1988, Bucharest Univ., On the Confinement of Hot Plasmas in Magnetic Fields; 
• 19. Andrei LUDU, 1989, Bucharest Univ., Methods of Transformations Groups in Plasma Physics; 
• [20. Ioan SCHNEIDER, 1992, Univ. Paris-Sud, Orsay, with Prof. Annick Giusti-Suzor, Basic Processes and Kinetic Computations in Recombination Plasmas]; 
• 21. Madalina Olimpia VLAD, 1992, Inst. of Atomic Physics, Bucharest, Theoretical and Experimental Methods for the Study of Anomalous Transport Processes in Thermonuclear Plasma; 
• 22. Florin SPINEANU, 1992, Bucharest Univ., Functional Methods for the Study of Plasma Turbulence; 
• 23. Ioan-Niculae BOGATU, 1994, Bucharest Univ., Radiative Processes in Plasma; 
• 24. Silviu Danut POPA, 1994, Inst. of Atomic Physics, Bucharest, Spectroscopic Investigation of a Discharge and Post-Discharge in Flowing Nitrogen and Nitrogen-Hydrogen Mixture at Low Pressures; 
• 25. Rudolf Emil NISTOR, 1994, Bucharest Univ., Study of the Optogalvanic Effect in the Microwave Wavelength Range and of the Microwave Passive Circuits; 
• [26. Cristian Mircea DOLOC, 1995, Univ. d�Orléans, with Prof. André Bouchoule, Trajectographical Study of Thermonuclear Protons in the Tore-Supra ]; 
• 27. Alexandru HENING, 1995, Inst. of Atomic Physics, Bucharest, Laser Plasmatrons. Physical Principles and Applications; 
• 28. Victor SOFONEA, 1995, Bucharest Univ., Collective Interactions in Magnetic Fluids; 
• [29. Adrian SERBAN, 1995, Nanyang Technol. Univ. Singapore, with Prof. Sing Lee, Anode geometry and plasma focus characteristics]; 
• [30 Carmen DUMITRESCU-ZOITA, 1996, Univ. Pierre et Marie Curie, Paris, with Prof. Jean Larour, X-Ray Emission from Hot, Dense, Magnetized Plasmas]; 
• 31 Mihai GANCIU-PETCU, 1996, Inst. of Atomic Physics, Bucharest, Pulsed Beam-Plasma Interaction; 
• [32. Savu-Sorin CIOBANU, 1996, Univ. d�Orléans, with Prof. Claude Fleurier, Metal Vapour Production in an Electrical Switch Arc]; 
• 33. Dana Maria MIU (GRIGORESCU), 1997, Bucharest Univ., Production of High T_c thin Layers by Laser and Cathode Sputtering Deposition; 
• 34. Andreia Ana POPESCU,1997, Bucharest Univ.,Contributions to the Study of Hard Layers by Plasma Assisted Methods; 
• [35. Gabriel MODREANU, 1999, Univ. Paris-Sud, Orsay, with Prof. Anne-Marie Pointu, Pulsed Hollow-Cathode Discharge: Intense Electron Beam and Filamentary Plasma]; 
• 36. Costel BILOIU, 1999. Bucharest Univ., Contributions to the Study of the Vacuum Arc Discharge in Metal Vapours; 
• 37. Radu PRESURA, 1999, Bucharest Univ., X-Ray Emission of Dense Hot Plasmas; 
• [38. Eduard DEWALD, 1999, Erlangen-Nürnberg Univ., with Prof. K. Frank and Prof. D.H.H. Hoffmann, Intense Electron Beams Produced in High Voltage Transient Hollow-Cathode Discharges: Comparative Studies and Applications]; 
• [39. Marta Elena DINDELEGAN, 1999, Univ. de Provence (Aix-Marseille I), with Prof. G. Bachet and Prof. R. Stamm, Diagnostic de marquage optique non linéaire appliqué à l�étude de la propagation de chocs électrostatiques dans un plasma de basse densité]; 
• [40. Magdalena NISTOR, 2000, Univ. Paris VI, with Prof. Yves Vitel, Faisceau d�électrons créé dans une décharge transitoire à cathode creuse: distribution énergétique, rayonnement X et ablation d�une cible solide]; 
• 41. Mihail-Liviu COSEREANU, 2000, Bucharest Univ., Study of CO₂ Plasmas as Laser Active Media; 
• 42. Vasile ZOITA, 2004 (pending), Bucharest Univ., Plasma Focus Devices;  
• 43. Andrea GROZA, 2004 (pending), Bucharest Univ., Interaction of Transient Plasmas with Dielectrics; 
• 44. Sorin VIZIREANU, 2005 (pending), Bucharest Univ., Carbonic Materials Obtained by Plasma Techniques; 
• 45. Maria Cristina PETCU, 2006 (pending), Bucharest Univ., RF Plasma Flow Investigations for Functional Materials Applications; 
• 46. Gina-Monica SAVOIU, 2006 (pending), Bucharest Univ., Studies on the Production and Characterization of Carbon and Titanium Based Nano-Powders by Laser Pyrolysis; 
• 47. Dan COLCEAG, 2007 (pending), under joint supervision of Bucharest Univ., with Prof. Ioan-Iovitz Popescu and Dr. Maria Dinescu, and of the National Polytechnical Institute of Lorene at Nancy (France), with Prof. Anne Dauscher and Prof. Bertrand Lenoir, Transport Properties and Physico-Chemical Characterization of Thin Layers of Skutterudites Compounds Produced by Laser Ablation. 

 

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L I S T  O F  S C I E N T I F I C  W O R K S 
(last updated in September 2004)

• BOOKS: 14 
• PAPERS IN FOREIGN INTERNATIONAL JOURNALS: 78 
• PAPERS IN ROMANIAN ACADEMY JOURNALS (R): 52 
• PAPERS IN INTERNATIONAL CONFERENCE PROCEEDINGS (P): 55 
• TOTAL NUMBER OF CITATIONS (cumulated till April 2001): 1506

BOOKS and DATABASES

• 1. GAZE IONIZATE: vol.I, PROCESE FUNDAMENTALE, 351 pages (1963), E.Badareu and Ioan-Iovitz Popescu, Editura Tehnica, Bucharest
• 2. GAZE IONIZATE: vol.II, DESCARCARI ELECTRICE IN GAZE, 323 pages (1965), E.Badareu and Ioan-Iovitz Popescu, Editura Tehnica, Bucharest; GAZ IONISÉS, DÉCHARGES ÉLECTRIQUES DANS LES GAZ, 336 pages (1968), E.Badareu and Ioan-Iovitz Popescu, Editions Dunod, Paris, and Meridiane, Bucharest
• 3. FIZICA GENERALA: vol.I, Mecanica si Caldura, 482 pages (1971); vol.II, Electricitatea si Optica, 447 pages (1973); vol. III, Structura Materiei, 508 pages (1975), R.Titeica and Ioan-Iovitz Popescu, Editura Tehnica, Bucharest
• 4. MIC MEMORATOR DE FIZICA SI CHIMIE (1974), Ioan-Iovitz Popescu, C.Holszky, A.Hristev, N.Gherbanovschi, and G.Enescu, Editura Tehnica, Bucharest. MIC MEMORATOR DE FIZICA, 270 pages (1976, 1991), Ioan-Iovitz Popescu, A.Hristev, N.Gherbanovschi and G.Enescu, Editura Tehnica, Bucharest
• 5. FIZICA PLASMEI SI APLICATII, 516 pages (1981), Ioan-Iovitz Popescu, I.Iova, and E.Toader, Editura Stiintifica si Enciclopedica, Bucharest
• 6. CINETICA SI DINAMICA PLASMEI, 459 pages (1983), Ioan-Iovitz Popescu and E.Toader, Editura Stiintifica si Enciclopedica, Bucharest
• 7. BAZELE FIZICII PLASMEI, 338 pages (1987), Ioan-Iovitz Popescu and D.Ciobotaru, Editura Tehnica, Bucharest
• 8. BAZELE SPECTROSCOPIEI PLASMEI, 375 pages (1987), I.Iova, Ioan-Iovitz Popescu, and E.Toader, Editura Stiintifica si Enciclopedica, Bucharest
• 9. OPTICA GEOMETRICA, 258 pages (1988), Ioan-Iovitz Popescu, Bucharest University Press
• 10. OPTICA, 326 pages (1989), Ioan-Iovitz Popescu and E.Toader, Editura Stiintifica si Enciclopedica, Bucharest
• 11. BAZELE FIZICE ALE OPTICII, VOL.I, OPTICA SCALARA (OPTICA GEOMETRICA, DIFRACTIA, OPTICA FOURIER, HOLOGRAFIA), 522 pages (1998), Ioan-Iovitz Popescu and F.Uliu, Editura Universitaria Craiova
• 12. PREMIILE NOBEL PENTRU FIZICA, 442 pages (1998), I.-Iovit Popescu and I.Dima, Editura Academiei Romane, Bucharest
• 13. JOURNAL IMPACT FACTORS OF INTEREST TO BASIC SCIENCES, compiled from SCI Journal Citation Reports, 48 pages, Version December 1999, Ioan-Iovitz Popescu, Editura Horia Hulubei, Bucharest; JOURNAL RANKING AND AVERAGE IMPACT FACTORS OF BASIC AND ALLIED SCIENCES, 60 pages, Version July 2000, Ioan-Iovitz Popescu, Editura Horia Hulubei, Bucharest. For electronic versions see web sites at URL's:                                                                                                   http://www.iipopescu.com                                                                                   http://alpha2.infim.ro/~ltpd/iipopescu.html                                                                           http://www.utdallas.edu/research/quantum/JournalRanking/

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PAPERS IN FOREIGN INTERNATIONAL JOURNALS

• 1. RESEARCHES ON THE DOUBLE CATHODE EFFECT, E.Badareu and Ioan-Iovitz Popescu, Journal of Electronics and Control, 4, 503-514 (1958)
• 2. CONTRIBUTIONS TO THE MECHANISM OF THE DOUBLE-CATHODE EFFECT, E.Badareu, Ioan-Iovitz Popescu, and I.Iova, Annalen der Physik (Leipzig) (in German), 5, 308-326 (1960)
• 3. RESONANT CHARGE-EXCHANGE AND THE KINETICS OF IONS, Ioan-Iovitz Popescu and N. Ionescu-Pallas, Zhur. Tekh. Fiz. (in Russian), 29, 866-876 (1959); Sov.Phys. - Tech.Phys., 4, 781-791 (1960)
• 4. ON THE RESONANT CHARGE TRANSFER FOR POSITIVE IONS, Ioan-Iovitz Popescu and N.Ionescu-Pallas, Proc.Phys.Soc. London A, 75, 807-809 (1960)
• 5. ON THE RESONANT CHARGE TRANSFER IN IONIZED DENSE GASES, Ioan-Iovitz Popescu, Proc.Phys.Soc. London A, 78, 584-587 (1961)
• 6. ON THE POSITIVE CHARGE CONDUCTIVITY OF IONIZED DENSE GASES, L.Brandus and Ioan-Iovitz Popescu, Proc.Phys.Soc. London A, 82, 590-593 (1963)
• 7. ON THE MOVEMENT OF POSITIVE IONS THROUGH THE POSITIVE SPACE CHARGE SHEATH, G.Ciobanu and Ioan-Iovitz Popescu, Journal of Electronics and Control, 16, 59-64 (1964)
• 8. ON SPACE CHARGE NEUTRALIZATION BY POSITIVE IONS IN LOW PRESSURE THERMIONIC CONVERTERS, L.Brandus, and Ioan-Iovitz Popescu, British Journal of Applied Physics (Journal of Physics D: Applied Physics), 15, 85-88 (1964)
• 9. SOME DATA ON CESIUM THERMIONIC CONVERTERS WITH MERCURY AND XENON MIXTURES, E.Badareu, Ioan-Iovitz Popescu, and O.Zamfir, Journal of Electronics and Control, 16, 653-658 (1964)
• 10. INVESTIGATIONS ON THE CESIUM-MERCURY DIODE, E.Badareu, Ioan-Iovitz Popescu, C.Ghita, and O.Zamfir, British Journal of Applied Physics (Journal of Physics D: Applied Physics), 15, 1171-1178 (1964)
• 11. INVESTIGATIONS ON THE CESIUM-CADMIUM DIODE, E.Badareu, Ioan-Iovitz Popescu, C.Ghita, G.Musa, and O.Zamfir, British Journal of Applied Physics (Journal of Physics D: Applied Physics), 16, 63-67 (1965)
• 12. ON THE DIFFUSION THEORY OF THE LOW VOLTAGE ARC PLASMA, Ioan-Iovitz Popescu, L.Brandus, C.Moldovan, and G.Musa, British Journal of Applied Physics (Journal of Physics D: Applied Physics), 17, 129-131 (1966)
• 13. INVESTIGATION OF THE THERMIONIC DETECTION OF PHOTOIONIZATION SPECTRA OF CESIUM VAPORS, Ioan-Iovitz Popescu, C.Ghita, Alexandrina Popescu, and G.Musa, Annalen der Physik (Berlin), 18, 103-111 (1966)
• 14. ON THE LOW VOLTAGE ARC IN CESIUM VAPORS, Ioan-Iovitz Popescu and Denisa Popescu, Annalen der Physik (Berlin), 19, 50-63 (1967)
• 15. ON THE IONIZATION OF CESIUM VAPORS BY A LASER BEAM, Ioan-Iovitz Popescu, C.Ghita, and N.Niculescu, Physics Letters A, 24, 276-277 (1967)
• 16. A TIME-OF-FLIGHT DETERMINATION OF THE DIFFUSION COEFFICIENT OF Cs⁺ IONS IN PARENT VAPORS, Ioan-Iovitz Popescu, N.Niculescu, and Alexandrina Popescu, British Journal of Applied Physics (Journal of Physics D: Applied Physics), 1, 313-317 (1968)
• 17. MOBILITY OF SIMPLE AND CLUSTER IONS IN ARGON AT HIGH PRESSURES, Ioan-Iovitz Popescu and R. von der Heide, Zeitschrift für Physik (in German), 220, 337-348 (1969)
• 18. ABSORPTION SPECTROSCOPY OF EXCITED CESIUM ATOMS, Denisa Popescu, Ioan-Iovitz Popescu, and J.Richter, Zeitschrift für Physik (in German), 226, 160-174 (1969)
• 19. USE OF SPACE CHARGE AMPLIFICATION TECHNIQUES IN THE ABSORPTION SPECTROSCOPY OF Cs AND Cs₂ , Denisa Popescu, M.L.Pascu, C.B.Collins, B.W.Johnson, and Ioan-Iovitz Popescu, Physical Review A, 8, 1666-1672 (1973)
• 20. MULTIPHOTON IONIZATION OF MOLECULAR CESIUM WITH A TUNABLE DYE LASER, C.B.Collins, B.W.Johnson, Denisa Popescu, G.Musa, M.L.Pascu, and Ioan-Iovitz Popescu, Physical Review A, 8, 2197-2201 (1973)
• 21. MULTIPHOTON EXCITATION AND IONIZATION OF ATOMIC CESIUM WITH A TUNABLE DYE LASER, Denisa Popescu, C.B.Collins, B.W.Johnson, and Ioan-Iovitz Popescu, Physical Review A, 9, 1182-1187 (1974)
• 22. MULTIPHOTON IONIZATION OF CESIUM THROUGH RESONANT DISSOCIATIVE MOLECULAR STATES OF Cs₂ , C.B.Collins, B.W.Johnson, M.Y.Mirza, Denisa Popescu, and Ioan-Iovitz Popescu, Physical Review A, 10, 813-821 (1974)
• 23. DOUBLET LINE-STRENGTH RATIOS FOR THE PRINCIPAL SERIES OF CESIUM, Denisa Popescu, Ioan-Iovitz Popescu, J.Maurer, C.B.Collins, and B.W.Johnson, Physical Review A, 12, 1425-1431 (1975)
• 24. FINE-STRUCTURE MEASUREMENTS OF TWO-PHOTON TRANSITIONS IN ATOMIC CESIUM WITH A TUNABLE DYE LASER, S.M.Curry, C.B.Collins, M.Y.Mirza, Denisa Popescu, and Ioan-Iovitz Popescu, Optics Communications, 16, 251-255 (1976). FINE AND HYPERFINE STRUCTURE MEASUREMENTS OF TWO-PHOTON TRANSITIONS IN ATOMIC CESIUM WITH A TUNABLE DYE LASER, S.M.Curry, C.B.Collins, T.W.Hänsch, S.A.Lee, Denisa Popescu, Ioan-Iovitz Popescu, and A.L.Schawlow (recipient Nobel Prize for Physics in 1981 for laser spectroscopy), Bull.Am.Phys.Soc., 19, 1198 (1974)
• 25. MULTIPHOTON IONIZATION OF RUBIDIUM, C.B.Collins, S.M.Curry, B.W.Johnson, M.Y.Mirza, M.A.Chellehmalzadeh, J.A.Anderson, Denisa Popescu, and Ioan-Iovitz Popescu, Physical Review A, 14, 1662-1671 (1976); MULTIPHOTON EXCITATION OF ATOMIC RUBIDIUM WITH A TUNABLE DYE LASER, C.B.Collins, S.M.Curry, B.W.Johnson, M.Y.Mirza, Denisa Popescu, and Ioan-Iovitz Popescu, Bull.Am.Phys.Soc., 20, 246 (1975)
• 26. ENHANCEMENT OF GAMMA-RAY ABSORPTION IN THE RADIATION FIELD OF A HIGH POWER LASER, C.B.Collins, S.Olariu, M.Petrascu, and Ioan-Iovitz Popescu, Physical Review Letters, 42, 1397-1400 (1979)
• 27. QUESTIONS OF GAUGE AND BASIS SETS FOR THE REPRESENTATION OF ELECTROMAGNETIC INTERACTIONS IN QUANTUM MECHANICS, S.Olariu, Ioan-Iovitz Popescu, and C.B.Collins, Physical Review D, 20, 3095-3107 (1979)
• 28. THE LASER-INDUCED RESONANT ABSORPTION OF GAMMA-RADIATION, C.B.Collins, S.Olariu, M.Petrascu, and Ioan-Iovitz Popescu, Physical Review C, 20, 1942-1945 (1979)
• 29. OPTICAL IMPEDANCE SPECTROSCOPY, C.Stanciulescu, R.Bobulescu, Ani Surmeian, Denisa Popescu, Ioan-Iovitz Popescu, and C.B.Collins, Applied Physics Letters, 37, 888-890 (1980)
• 30. TWO PHOTON TECHNIQUE FOR THE DISSOCIATIVE SPECTROSCOPY OF SIMPLE MOLECULES, C.B.Collins, J.A.Anderson, F.W.Lee, P.A.Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, Physical Review Letters, 44, 139-142 (1980); MULTIPHOTON TECHNIQUE FOR DISSOCIATIVE SPECTROSCOPY OF SIMPLE MOLECULES, C.B.Collins, F.W.Lee, J.A.Anderson, P.A.Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, Jour. Optical Society of America, 70, 628 (1980)
• 31. PHOTOLYTIC SPECTROSCOPY OF SIMPLE MOLECULES, PART I, THE PRODUCTION OF 5²D ATOMS FROM Cs₂ , C.B.Collins, J.A.Anderson, Denisa Popescu, and Ioan-Iovitz Popescu, Journal of Chemical Physics, 74, 1053-1066 (1981)
• 32. PHOTOLYTIC SPECTROSCOPY OF SIMPLE MOLECULES, PART II, THE PRODUCTION OF 6P ATOMS FROM THE X¹S_g STATE OF Cs₂ , C.B.Collins, F.W.Lee, J.A.Anderson, P.A.Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, Journal of Chemical Physics, 74, 1067-1073 (1981)
• 33. PHOTOLYTIC SPECTROSCOPY OF SIMPLE MOLECULES, PART III: THE SELECTIVE PHOTOLYSIS OF CsKr AND Cs₂Kr AT VISIBLE WAVELENGTHS, C.B.Collins, F.W.Lee, H.Golnabi, F.Davanloo, P.A.Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, Journal of Chemical Physics, 75, 4852-4862 (1981); STATE-SELECTIVE PHOTOLYSIS OF Cs₂ AND CsKr , Bull.Am.Phys.Soc., 26, 727 (1981); STATE-SELECTIVE PHOTOLYSIS OF CsKr AND Cs₂Kr , Bull.Am.Phys.Soc., 27, 113 (1982)
• 34. THE TUNING OF THE GAMMA-RAY PROCESS WITH HIGH POWER OPTICAL RADIATION, S. Olariu, Ioan-Iovitz Popescu, and C.B. Collins, Physical Review C, 23, 50-63 (1981); Jour. Optical Society of America, 70, 642-643 (1980)
• 35. MULTIPHOTON GENERATION OF OPTICAL SIDEBANDS TO NUCLEAR TRANSITIONS, S. Olariu, Ioan-Iovitz Popescu, and C.B. Collins, Physical Review C, 23, 1007-1014 (1981)
• 36. SELECTIVE PHOTOLYSIS AND PHOTOIONIZATION OF ALKALI METAL DIMERS, C.B. Collins, F.W. Lee, P.A. Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, American Chemical Society Symposium Series on "Metal Bonding and Interactions in High Temperature Systems with Emphasis on Alkali Metals", 179, 19 (1982)
• 37. THE COHERENT AND INCOHERENT PUMPING OF A GAMMA-RAY LASER WITH INTENSE OPTICAL RADIATION, C.B.Collins, F.W.Lee, D.M.Shemwell, B.D.DePaola, S.Olariu, and Ioan-Iovitz Popescu, Journal of Applied Physics, 53, 4645-4651 (1982). PROSPECTS OF THE PUMPING OF A GAMMA-RAY LASER WITH INTENSE OPTICAL RADIATION, C.B.Collins, F.W.Lee, D.M.Shemwell, B.D.DePaola, S.Olariu, and Ioan-Iovitz Popescu, Applied Physics B, 28, 203-204 (1982)
• 38. SCATTERING OF CHARGED PARTICLES BY MAGNETIC STRINGS, S. Olariu and Ioan-Iovitz Popescu, Physical Review D, 27, 383-394 (1983)
• 39. A SURVEY ON THE ROMANIAN CONTRIBUTIONS TO THE DEVELOPMENT OF OPTOGALVANIC SPECTROSCOPY, Ioan-Iovitz Popescu, Journal de Physique (Paris), 44, Colloque C7, suppl. au no.11, 3-20 (1983)
• 40. THE QUANTUM EFFECTS OF ELECTROMAGNETIC FLUXES, S.Olariu and Ioan-Iovitz Popescu, Reviews of Modern Physics, 57, 339-436 (1985)
• 41. THE DIRECT DISSOCIATIVE RECOMBINATION OF THE HYDROGEN MOLECULAR ION AT LOW ENERGIES, I. Schneider, I. N. Mihailescu, L. Nanu, and Ioan-Iovitz Popescu, Journal of Physics B, 18, 791-807 (1985)
• 42. TOPIC-A TOKAMAK PLASMA IMPURITY CODE, T. Beu, F.Spineanu, M.Vlad, R.Campeanu, and Ioan-Iovitz Popescu, Computer Physics Communications, 36, 161-176 (1985)
• 43. NUCLEAR MULTIPHOTON TRANSITIONS INDUCED BY MODULATED HYPERFINE ELECTRIC FIELD GRADIENTS, S. Olariu, M. Sorescu, Ioan-Iovitz Popescu, and C.B.Collins, Eurphysics Letters, 2, 725-732 (1986) [In August 2004 not yet available online]
• 44. ELECTROMAGNETIC INTERACTIONS IN MULTICONNECTED SPACES, S.Olariu and Ioan-Iovitz Popescu, Physical Review D, 33, 1701-1708 (1986)
• 45. STRIMP-PROGRAM FOR STUDYING THE IMPURITY EVOLUTION IN TOKAMAK PLASMAS, F.Spineanu, M.Vlad, and Ioan-Iovitz Popescu, Computer Physics Communications, 41, 155-168 (1986)
• 46. A PHENOMENOLOGICAL APPROACH TO THE OPTOACOUSTIC EFFECT IN DISCHARGE PLASMAS, V.Sofonea and Ioan-Iovitz Popescu, Optics Communications, 60, 302-305 (1986)
• 47. OPTICAL FILTERING TECHNIQUE FOR SURFACE ROUGHNESS MEASUREMENTS, A. Dogariu, M. Dogariu, Ioan-Iovitz Popescu, and B. Cosma, Optica Applicata, 19, 343-347 (1989)
• 48. GROUP THEORETIC APPROACH TO THE MAGNETOHYDRODYNAMIC EQUATIONS AND GROUP INVARIANT SOLUTIONS, A.Ludu and Ioan-Iovitz Popescu, Contributions to Plasma Physics, 30 (1990)
• 49. THEORY OF OPTOGALVANIC SIGNALS ORIGINATING FROM METASTABLE STATES IN HOLLOW CATHODE NEON DISCHARGES, V.Sofonea and Ioan-Iovitz Popescu, Contributions to Plasma Physics, 30, 215-222 (1990)
• 50. A NEW PLASMA SPECTROSCOPIC TECHNIQUE BASED ON LASER INDUCED FREQUENCY SHIFT OF PSEUDOSONIC ION WAVES, Ioan-Iovitz Popescu, M.A.Bratescu, and M. Dinca, Spectrochimica Acta B, 46, 547-550 (1991)
• 51. QUASI-CW LASER AT 585.3 nm OF THE Ne I LINE IN Ne-H MIXTURE IN A SIMPLE CO-AXIAL ALTERNATING HIGH-VOLTAGE GLOW DISCHARGE, M.Ganciu, Ani Surmeian, C.Diplasu, I.Chera, G.Musa, and Ioan-Iovitz Popescu, Optics Communications, 88, 381-384 (1992)
• 52. GENERATION OF INTENSE PULSED ELECTRON BEAMS BY SUPERPOSITION OF TWO DISCHARGES, M.Ganciu, G.Modreanu, Anne-Marie Pointu, and Ioan-Iovitz Popescu, Journal of Physics D: Applied Physics, 27, 1370-1374 (1994)
• 53. A HIGH DENSITY PULSED ION TRAP, M.Ganciu, Ioan-Iovitz Popescu, V.Zoran, and Anne-Marie Pointu, Nuclear Instruments and Methods B, 98, 541-544 (1995)
• 54. TRANSIENT ELECTRON BEAMS CREATED BY DIELECTRIC HOLLOW CATHODE AS A TOOL FOR APPLICATIONS, N.B.Mandache, Anne-Marie Pointu, D.G.Dimitriu, M.Ganciu, G.Musa, Ioan-Iovitz Popescu, E.Dewald, and Magdalena Nistor, Le Vide, Suppl., 275, 337-340(1995)
• 55. HIGH-REPETITION-RATE OPERATION OF A DOUBLE-DISCHARGE ELECTRON BEAM GENERATOR, M.V.Udrea, M.Stoica, I.Bulca, C.Flacau, Anne-Marie Pointu, M.Ganciu, D.Penache, and Ioan-Iovitz Popescu, Optical Engineering, 35, 1330-1333 (1996)
• 56. THE CHARACTERIZATION OF PREIONIZATION-CONTROLLED ELECTRON BEAMS PRODUCED IN OPEN-ENDED HOLLOW-CATHODE TRANSIENT DISCHARGES, N.B.Mandache, Anne-Marie Pointu, E.Dewald, Magdalena Nistor, M.Ganciu, G.Musa, and Ioan-Iovitz Popescu, Plasma Sources Science and Technology, 6, 1-7 (1997)
• 57. DETERMINATION OF THE GAS TEMPERATURE FROM SHOCK WAVES OCCURRING IN THE AFTERGLOW OF PULSED DISCHARGES, Ani Surmeian, C.Diplasu, C.B.Collins, G.Musa, and Ioan-Iovitz Popescu, Journal of Physics D: Applied Physics, 30, 1341-1345 (1997)
• 58. ELECTRON TEMPERATURE MEASUREMENTS IN THE AFTERGLOW PLASMA OF A HIGH VOLTAGE PULSED DISCHARGE IN CESIUM VAPOURS, Ani Surmeian, C.Diplasu, C.B.Collins, G.Musa, and Ioan-Iovitz Popescu, Journal of Physics D: Applied Physics, 30, 1755-1758 (1997)
• 59. PULSED INTENSE ELECTRON BEAMS GENERATED IN TRANSIENT HOLLOW CATHODE DISCHARGES: FUNDAMENTALS AND APPLICATIONS, E.Dewald, K.Frank, D.H.H.Hoffmann, R.Stark, M.Ganciu, N.B.Mandache, Magdalena Nistor, Anne-Marie Pointu, and Ioan-Iovitz Popescu, IEEE Transactions on Plasma Science, 25, 272-278 (April, 1997)
• 60. THE ROLE OF MULTIELECTRODE GEOMETRY IN GENERATION OF PULSED INTENSE ELECTRON BEAMS IN PREIONIZATION-CONTROLLED OPEN ENDED HOLLOW CATHODE TRANSIENT DISCHARGES, E.Dewald, M.Ganciu, N.B.Mandache, G.Musa, Magdalena Nistor, Anne-Marie Pointu, Ioan-Iovitz Popescu, K.Frank, D.H.H.Hoffmann, and R.Stark, IEEE Transactions on Plasma Science, 25, 279-283 (April, 1997)
• 61. PULSED ELECTRON BEAMS IN LONG FILAMENTARY DISCHARGES, M.V.Udrea, Anne-Marie Pointu, G.Modreanu, M.Ganciu, Ioan-Iovitz Popescu, and N.B.Mandache, Journal of Physics D: Applied Physics, 30, L33-L36 (1997)
• 62. EMISSION OF GAMMA RAYS BY ELECTRON-NUCLEAR DOUBLE TRANSITION, S.Olariu, Ioan-Iovitz Popescu, J.J.Carroll, and C.B.Collins, Proceedings of theFirst International Gamma-Ray Laser Workshop, Predeal '95, Romania, August 19-23 (1995), Hyperfine Interactions, 107, 197-203 (1997)
• 63. X-RAY GENERATION IN INVERSE CAPILLARY DISCHARGES FOR PUMPING, V.Zoran, M.Ganciu, Anne-Marie Pointu, C.B.Collins, and Ioan-Iovitz Popescu, Proceedings of the First International Gamma-Ray Laser Workshop, Predeal '95, Romania, August 19-23 (1995), Hyperfine Interactions, 107, 415-430 (1997)
• 64. INTENSE ELECTRON BEAMS PRODUCED IN PSEUDOSPARKS AND PCOHC FOR BEAM-PLASMA INTERACTION EXPERIMENTS, E.Dewald, K.Frank, D.H.H.Hoffmann, M.Ganciu, N.B.Mandache, Magdalena Nistor, Anne-Marie Pointu, and Ioan-Iovitz Popescu, Nuclear Instruments and Methods A, 415, 614-620 (1998)
• 65. ACCELERATED EMISSION OF GAMMA RAYS FROM THE 31-YR ISOMER OF ¹⁷⁸Hf INDUCED BY X-RAY IRRADIATION, C.B.Collins, F.Davanloo, M.C.Iosif, R.Dussart, J.M.Hicks, S.A.Karamian, C.A.Ur, Ioan-Iovitz Popescu, V.I.Kirischuk, J.J.Carroll, H.E.Roberts, P.McDaniel, and C.E.Crist, Physical Review Letters, 82, 695-698 (1999). REPLY TO THREE COMMENTS ON �ACCELERATED EMISSION OF GAMMA RAYS FROM THE 31-YR ISOMER OF ¹⁷⁸Hf INDUCED BY X-RAY IRRADIATION", C.B.Collins, F.Davanloo, M.C.Iosif, R.Dussart, J.M.Hicks, S.A.Karamian, C.A.Ur, Ioan-Iovitz Popescu, V.I.Kirischuk, H.E.Roberts, P.McDaniel, and C.E.Crist, Physical Review Letters, 84, 2544-2545 (2000)
• 66. STUDY OF THE GAMMA EMISSION FROM THE 31-YR ISOMER OF ¹⁷⁸Hf INDUCED BY X-RAY IRRADIATION, C.B.Collins, F.Davanloo, A.C.Rusu, M.C.Iosif, N.C.Zoita, D.T.Camase, J.M.Hicks, S.A.Karamian, C.A.Ur, Ioan-Iovitz Popescu, R.Dussart, J. M. Pouvesle, V.I.Kirischuk, N.V.Strilchuk, P.McDaniel, and C.E.Crist, Physical Review C, 61, 054305(7) (18 April 2000)
• 67. TIME-RESOLVED MEASUREMENT OF THE ENERGY DISTRIBUTION FUNCTION OF AN ELECTRON BEAM CREATED BY A TRANSIENT HOLLOW CATHODE DISCHARGE, G.Modreanu, N.B.Mandache, Anne-Marie Pointu, M.Ganciu, and Ioan-Iovitz Popescu, Journal of Physics D: Applied Physics, 33, 819-825 (2000)
• 68. STUDY OF GAMMA EMISSION FROM THE 31-YR ISOMER OF ¹⁷⁸Hf INDUCED BY X-RAY IRRADIATION, C.B.Collins, F.Davanloo, M.C.Iosif, R.Dussart, J.M.Hicks, S.A.Karamian, C.A.Ur, Ioan-Iovitz Popescu, V.I.Kirischuk, J.M.Pouvesle, P.McDaniel, and C.E.Crist, Physics of Atomic Nuclei (Yadernaya Fizika), 63, 2067-2072 (2000)
• 69. SCALING OF GAMMA-RAY TRANSITIONS INDUCED IN NUCLEAR SPIN ISOMERS BY X-RAYS, C.B.Collins, N.C.Zoita, A.C.Rusu, M.C.Iosif, D.T.Camase, F.Davanloo, J.M.Pouvesle, R.Dussart, V.I.Kirischuk, N.V.Strilchuk, C.A.Ur, Ioan-Iovitz Popescu, F.J.Agee, Laser Physics, 11 (1), 1-5 (2001)
• 70. GAMMA-RAY TRANSITIONS INDUCED IN NUCLEAR SPIN ISOMERS BY X-RAYS, C.B.Collins, A.C.Rusu, N.C.Zoita, M.C.Iosif, D.T.Camase, F.Davanloo, C.A.Ur, Ioan-Iovitz Popescu, J.M.Pouvesle, R.Dussart, V.I.Kirischuk, N.V.Strilchuk, F.J.Agee, Hyperfine Interactions, 135, 51-70 (2001)
• 71. TUNABLE SYNCHROTRON RADIATION USED TO INDUCE GAMMA-EMISSION FROM THE 31 YEAR ISOMER OF 178Hf, C.B.Collins, N.C.Zoita, A.C.Rusu, M.C.Iosif, D.T.Camase, F.Davanloo, S.Emura, T.Uruga, R.Dussart, J.M.Pouvesle, C.A.Ur, Ioan-Iovitz Popescu, V.I.Kirischuk, N.V.Strilchuk, and F.J.Agee, Europhyics Letters, 57 (5), 677-682 (2002)
• 72. ACCUMULATION OF THE ^178m2Hf ISOMERIC NUCLEI THROUGH SPALLATION WITH INTERMEDIATE-ENERGY PROTONS OF TANTALUM AND RHENIUM TARGETS, S.A. Karamian, J.Adam, D.V.Filossofov, D.Henzlova, V.Henzl, V.G.Kalinnikov,  N.A.Lebedev, A.F.Novgorodov, C.B.Collins, Ioan-Iovitz Popescu, and C.A.Ur, PREPRINT E6-2001-249 of the Joint Institute for Nuclear Research, Dubna, Russia, 26 pages (2001), Nuclear Instruments and Methods A, 489, 448-468 (2002)
• 73. ON A ZIPF'S LAW EXTENSION TO IMPACT FACTORS, Ioan-Iovitz Popescu, Glottometrics, 6, 83-93 (2003)
• 74. ACCELERATED DECAY OF THE 31-YR ISOMER OF HF-178 INDUCED BY LOW-ENERGY PHOTONS AND ELECTRONS, C. B. Collins, N. C. Zoita, F. Davanloo, S. Emura, Y. Yoda, T. Uruga, B. Patterson, B. Schmitt, J. M. Pouvesle, Ioan-Iovitz Popescu, V. I. Kirischuk, and N. V. Strilchuk, Laser Physics, 14 (2), 154-165 (2004)
• 75. YIELD OF RADIONUCLIDES AND ISOMERS PRODUCED IN THE FRAGMENTATION OF natW AND 186W (97%) TARGETS WITH PROTONS AT 630, 420 AND 270 MeV, S. A. Karamian, J. Adam, P. Chaloun, D. V. Filossofov, V. Henzl, D. Henzlova, V. G. Kalinnikov, N. A. Korolev, N. A. Lebedev, A. F. Novgorodov, C. B. Collins, Ioan-Iovitz Popescu, and C. A. Ur, Nuclear Instruments and Methods A, 527, 609-823 (2004)
• 76. ACCELERATED GAMMA-EMISSION FROM ISOMERIC NUCLEI, C. B. Collins, N. C. Zoita, F. Davanloo, S. Emura, Y. Yoda, T. Uruga, B. Patterson, B. Schmitt, J. M. Pouvesle, Ioan-Iovitz Popescu, V. I. Kirischuk, and N. V. Strilchuk, Radiation Physics and Chemistry, 71, 619-625 (2004)
• 77. NUCLEAR RESONANCE SPECTROSCOPY OF THE 31-YR ISOMER OF Hf-178, C. B. Collins, N. C. Zoita, F. Davanloo, Y. Yoda, T. Uruga, J. M. Pouvesle, and Ioan-Iovitz Popescu, Laser Physics Letters (Received: 20 October 2004; Accepted: 24 October 2004), Digital Object Identifier (DOI): 10.1002/lapl.200410154 (About DOI)
• 78. INFRARED SPECTRAL INVESTIGATION OF THE LINSEED OIL POLYMERIZATION IN A CORONA DISCHARGE IN AIR AT ATMOSPHERIC PRESSURE, A. Groza, A. Surmeian, M. Ganciu, and Ioan-Iovitz Popescu, Europhysics Letters, 68 (5), 652-657 (2004), Digital Object Identifier (DOI): 10.1209/epl/i2004-10253-y (About DOI)

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PAPERS IN ROMANIAN ACADEMY JOURNALS (R)

• 1R. KINETICS OF IONS IN GASES, Ioan-Iovitz Popescu, Rev. Roum. Phys., 4, 199-209 (1959)
• 2R. CONTRIBUTIONS TO THE CATHODE FALL THEORY, Ioan-Iovitz Popescu, Rev. Roum. Phys. (in French), 4, 211-219 (1959)
• 3R. SOME PROBLEMS REGARDING THE PHENOMENA OCCURRING AT THE CATHODE OF THE GLOW DISCHARGE, E.Badareu and Ioan-Iovitz Popescu, Rev. Roum. Phys., 5, 41-82 (1960); Stud. Cerc. Fiz. (in Roumanian), 10, 689-732 (1959)
• 4R. PROCESSES OCCURRING IN THE CATHODIC PARTS OF THE ABNORMAL GLOW DISCHARGE IN HELIUM, E.Badareu, Ioan-Iovitz Popescu, and I.Iova, Rev. Roum. Phys. (in German), 5, 287-293 (1960); Stud.Cerc.Fiz. (in Roumanian), 11, 597-603 (1960)
• 5R. ON THE IMPURITY CONDUCTION IN SEMICONDUCTORS AT LOW TEMPERATURES, A.Glodeanu and Ioan-Iovitz Popescu, Rev. Roum. Phys.(in French), 7, 403-406 (1962)
• 6R. THE MOBILITY OF POSITIVE CHARGE IN IONIZED DENSE GASES, Ioan-Iovitz Popescu, Stud. Cerc. Fiz. (in Roumanian), 3, 449-453 (1962)
• 7R. ATOMIC ABSORPTION BY ELECTRON SPECTROSCOPY, E.Badareu, Ioan-Iovitz Popescu, C.Ghita, and G.Musa, Rev. Roum. Phys., 10, 785-798 (1965)
• 8R. ON THE USE OF PHOTOIONIZATION IN DIRECT ELECTRICAL POWER GENERATION, Ioan-Iovitz Popescu, G.Musa, Alexandrina Popescu, and Alexandra Baltog, Rev. Roum. Phys., 11, 925-935 (1966)
• 9R. ON THE LOW VOLTAGE ARC MODE IN THERMIONIC CONVERTERS, Ioan-Iovitz Popescu and Denisa Popescu, Rev. Roum. Phys., 11, 725-745 (1966)
• 10R. TIME-OF-FLIGHT ANALYSIS OF CAESIUM IONS IN CAESIUM, Ioan-Iovitz Popescu, N.Niculescu, and Alexandrina Popescu, Rev. Roum. Phys., 13, 51-57 (1968)
• 11R. HIGH RESOLUTION SPECTROSCOPY WITH TUNABLE DYE LASERS, Denisa Popescu, C.Stanciulescu, R.Bobulescu, M.A.Bratescu, and Ioan-Iovitz Popescu, Analele Universitatii Bucuresti, Fizica, 25, 27-33 (1976)
• 12R. A CONTRIBUTION TO THE POSITIVE ION KINETICS IN THE CATHODE FALL OF THE ABNORMAL GLOW DISCHARGE, L.Dinu and Ioan-Iovitz Popescu, Rev. Roum. Phys., 23, 901- 917 (1978)
• 13R. A PLANE PARALLEL PLATES NITROGEN PULSED LASER, C.Stanciulescu, R.Bobulescu, Denisa Popescu, and Ioan-Iovitz Popescu, Rev. Roum. Phys., 24, 301-304 (1979)
• 14R. A THEORY OF THE MOLECULAR SATELLITES OF THE 6S-7P DOUBLET OF CAESIUM, E.Toader, Ioan-Iovitz Popescu, and C.B.Collins, Rev. Roum. Phys., 24, 291-299 (1979)
• 15R. A NEW METHOD IN ATOMIC LASER SPECTROSCOPY OF SPUTTERED METALS, R.Bobulescu, C.Stanciulescu, Ani Surmeian, Denisa Popescu, and Ioan-Iovitz Popescu, Rev. Roum. Phys., 24, 311-315 (1979)
• 16R. TUNABLE LASER QUANTITATIVE ABSORPTION SPECTROSCOPY OF SPUTTERED URANIUM ATOMS IN THE HOLLOW CATHODE GLOW DISCHARGE, Denisa Popescu, Ioan-Iovitz Popescu, R.Bobulescu, and Ani Surmeian, Rev. Roum. Phys., 24, 773-779 (1979)
• 17R. OPTOGALVANIC LASER SPECTROSCOPY OF THERMIONIC AND HOLLOW CATHODE PLASMAS OF ALKALI, RARE GAS AND URANIUM, Denisa Popescu, R.Bobulescu, C.Stanciulescu, Ani Surmeian, Ioan-Iovitz Popescu, and C.B.Collins, Rev. Roum. Phys., 25, 771-781 (1980)
• 18R. HERTZIAN AND OPTICAL IMPEDANCE SPECTROSCOPY, PART I, C.Stanciulescu, R.Bobulescu, Ani Surmeian, Denisa Popescu, Ioan-Iovitz Popescu, and C.B.Collins, Rev. Roum. Phys., 25, 783-791 (1980)
• 19R. HERTZIAN AND OPTICAL IMPEDANCE SPECTROSCOPY, PART II, C.Stanciulescu, R.Bobulescu, Ani Surmeian, Denisa Popescu, Ioan-Iovitz Popescu, and C.B.Collins, Rev. Roum. Phys., 25, 915-926 (1980)
• 20R. TWO PHOTON OPTICAL IMPEDANCE SPECTROSCOPY, R.Bobulescu, C.Stanciulescu, Ani Surmeian, Denisa Popescu, Ioan-Iovitz Popescu, and C.B.Collins, Rev. Roum. Phys., 25, 927-933 (1980)
• 21R. PHOTON ASSISTED RADIATIVE COLLISIONS, PART I, W.M.Tepfenhart, I.Schneider, C.B.Collins, and Ioan-Iovitz Popescu, Rev. Roum. Phys., 26, 815-827 (1981)
• 22R. PHOTON ASSISTED RADIATIVE COLLISIONS, PART II, W.M.Tepfenhart, I.Schneider, C.B.Collins, and Ioan-Iovitz Popescu,Rev. Roum. Phys., 27, 151-165 (1982)
• 23R. AMPLIFICATION OF GAMMA RADIATION FROM X-RAY EXCITED NUCLEAR STATES, S.Olariu, Ioan-Iovitz Popescu, and C.B.Collins, Rev. Roum. Phys., 27, 559-565 (1982); also available from Los Alamos E-Print Archive, paper arXiv: nucl-ex/9907010v1 18 Jul 1999, at the entry: http://arxiv.org/PS_cache/nucl-ex/pdf/9907/9907010.pdf
• 24R. FREQUENCY LOCKED HELIUM-NEON LASER BY OPTOGALVANIC EFFECT, D.Apostol, C.Blanaru, A.Ionescu, G.Popescu, Ioan-Iovitz Popescu, and V.Vasiliu, Rev. Roum. Phys., 27, 581-585 (1982)
• 25R. IONIZATION EFFICIENCY IN AN ARGON PLASMA COLUMN, E.Toader Ioan-Iovitz Popescu, and I.Iova, Rev. Roum. Phys., 28, 153-158 (1983)
• 26R. SOME CONSEQUENCES OF LORENTZ TRANSFORMATIONS IN OPTICS, A.Belea and Ioan-Iovitz Popescu, Rev. Roum. Phys., 29, 409-420 (1984)
• 27R. VISUAL APPEARANCE OF RELATIVISTIC MOVING OBJECTS THROUGH REFRACTIVE MEDIA, A.Belea and Ioan-Iovitz Popescu, Rev. Roum. Phys., 29, 783-801 (1984)
• 28R. SPECIAL EINSTEIN-LORENTZ TRANSFORMATION: A PROJECTIVE APPROACH, A.Ludu and Ioan-Iovitz Popescu, Rev. Roum. Phys., 30, 737-744 (1985)
• 29R. A PHENOMENOLOGICAL APPROACH OF SIMULTANEOUS OPTOGALVANIC AND OPTOACOUSTIC EFFECTS IN NEON DISCHARGES, V.Sofonea and Ioan-Iovitz Popescu, Rev. Roum. Phys., 32, 757-764 (1987)
• 30R. A RATE EQUATION MODEL OF THE TRANSIENT OPTOGALVANIC EFFECT IN A NEON DISCHARGE, Ioan-Iovitz Popescu, M.A.Bratescu, and T.Popescu, Rev. Roum. Phys., 33, 155-164 (1988)
• 31R. TRANSIENT OPTOGALVANIC SIGNALS IN THE NEGATIVE GLOW AND POSITIVE COLUMN OF A NEON DISCHARGE, Ioan-Iovitz Popescu, M.A.Bratescu, and T.Popescu, Rev. Roum. Phys., 33, 165-174 (1988)
• 32R. GROUP ANALYSIS OF RELATIVISTIC EULER EQUATION IN THE ROTATIONALLY SYMMETRIC CASE AND SOME NEW EXACT SOLUTIONS, A.Ludu and Ioan-Iovitz Popescu, Rev. Roum. Phys., 33, 821-824 (1988)
• 33R. THE PROPERTIES AND SOME CHARACTERISTIC FEATURES OF RING DISCHARGES, Ioan-Iovitz Popescu, N.Gherbanovschi, and O.Stoican, Rev. Roum. Phys., 33, 47-56 (1988)
• 34R. PARAMETERS FOR THE FIRST ORDER STATISTICS OF SPECKLE PATTERNS, A.Dogariu, M.Dogariu, B.Cosma, and Ioan-Iovitz Popescu, Rev. Roum. Phys., 34, 393-396 (1989)
• 35R. A PHENOMENOLOGICAL APPROACH TO THE TEMPORAL EVOLUTION OF OPTOGALVANIC SIGNALS IN HOLLOW CATHODE NEON DISCHARGES, V.Sofonea and Ioan-Iovitz Popescu, Rev. Roum. Phys., 34, 1029-1033 (1989)
• 36R. A STABILIZED LOW POWER RF TORCH DISCHARGE FOR ANALYTICAL SPECTROMETRY, E.Tataru, S.Anghel, and Ioan-Iovitz Popescu,Rev. Roum. Phys., 36, 29-44 (1991)
• 37R. SURFACE GUIDED ELECTRON BEAMS ON DIELECTRIC FIBERS (THE CRUISE EFFECT), M.Ganciu, E.Dewald, Magdalena Nistor, D.Penache, Ioan-Iovitz Popescu, and V.Zoran, Romanian Journ. Phys., 39, 787-789 (1994)
• 38R. A SIMPLE SCIENTOMETRIC ASSESSMENT OF INDIVIDUAL CONTRIBUTIONS IN FUNDAMENTAL PHYSICS, Ioan-Iovitz Popescu, Romanian Rep. Phys., 46, 899-905 (1994)
• 39R. PULSED ELECTRON BEAMS IN TRANSIENT PLASMAS, M.Ganciu, Anne-Marie Pointu, Ioan-Iovitz Popescu, N.B.Mandache, and V.Zoran, Romanian Journ. Phys., 40, 673-701 (1995)
• 40R. A MODEL OF POPULATION PROCESSES OF ATOMIC HYDROGEN IMPURITIES IN HELIUM AFTERGLOW, Ani Surmeian, C.Diplasu, Ioan-Iovitz Popescu, G.Musa, and C.B.Collins, Romanian Journ. Phys., 41, 661-668 (1996)
• 41R. ON THE LAVALETTE RANKING LAW, Ioan-Iovitz Popescu, M.Ganciu, Maria-Cristina Penache, and D.Penache, Romanian Rep. Phys., 49, 3-27 (1997)
• 42R. LONG AND INTENSE CONSTRICTED PULSED DISCHARGE AT LOW GAS PRESSURE, C.B.Collins, C.Diplasu, Ani Surmeian, M.Ganciu, Anne-Marie Pointu, G.Musa, and Ioan-Iovitz Popescu, Romanian Rep. Phys., 49, 163-168 (1997)
• 43R. CHARACTERIZATION OF INTENSE ELECTRON BEAMS PRODUCED IN PREIONIZATION CONTROLLED MULTIELECTRODE TRANSIENT HOLLOW CATHODE DISCHARGES, E.Dewald, M.Ganciu, B.N.Mandache, Gh.Musa, Magdalena Nistor, Anne-Marie Pointu Pointu, and Ioan-Iovitz Popescu, Romanian Rep. Phys., 49, 169-175 (1997)
• 44R. AN ENERGY DISPERSIVE ABSORPTION METHOD FOR CHARACTERIZATION OF X-RAY EMISSION IN REPETITIVE PULSED DISCHARGES, Maria-Cristina Penache, Sanda Enescu, Doina M?n?il?, D.Penache, M.Ganciu, V. Zoran, and Ioan-Iovitz Popescu, Romanian Rep. Phys., 49, 177-181 (1997)
• 45R. GAS TEMPERATURE DETERMINATION IN NEON AND HELIUM AFTERGLOWS, Ani Surmeian, C.Diplasu, C.B.Collins, G.Musa, and Ioan-Iovitz Popescu, Romanian Rep. Phys., 49, 183-188 (1997)
• 46R. THE DETERMINATION OF THE ELECTRON TEMPERATURE IN CESIUM AFTERGLOWS, Ani Surmeian, C.Diplasu, C.B.Collins, G.Musa, and Ioan-Iovitz Popescu, Romanian Rep. Phys., 49, 189-194 (1997)
• 47R. TEANSIENT FILAMENTARY PLASMAS CREATED BY INTENSE PULSED ELECTRON BEAMS, Anne-Marie Pointu, G. Modreanu, E. Dewald, M.Ganciu, N.B. Mandache, G. Musa, Magdalena Nistor, Maria-Cristina Penache, D. Penache, Ioan-Iovitz Popescu, and M.V. Udrea, Invited Paper at the IX Conference on Plasma Physics and Applications, Bucharest, June 27-30, 1996, Romanian Rep. Phys., 49, Nos. 3-4 (1997)
• 48R. ON THE MECHANISM OF ELECTRON ACCELERATION IN OPEN ENDED HOLLOW CATHODE TRANSIENT DISCHARGES, N.B.Mandache, E.Dewald, M.Ganciu, Magdalena Nistor, Anne-Marie Pointu, and Ioan-Iovitz Popescu, Romanian Rep. Phys., 49, 567-574 (1997)
• 49R. A METHOD FOR DETERMINATION OF PARTIAL PRESSURE OF HYDROGEN IMPURITIES IN NEON AFTERGLOW, Ani Surmeian, C.Diplasu, C.B.Collins, G.Musa, and Ioan-Iovitz Popescu, Romanian Rep. Phys., 49, 575-583 (1997)
• 50R. CORONA DISCHARGE CONTROLLED AGGREGATION AND SEGREGATION OF SOLID MATERIALS IN LIQUIDS AND ASSOCIATED EHD PHENOMENA, M.Ganciu, S.Udrea, Maria-Cristina Penache, I.Vâta, Ioan-Iovitz Popescu, M.A.Ilies, Mihaela Corciumaru, A.Papoiu, B.Serban, and A.T.Balaban, Romanian Journ. Phys., 43, Nos. 1-2, Suppl., 67-77 (1998)
• 51R. TRANSIENT FILAMENTARY PLASMAS CREATED BY INTENSE PULSED ELECTRON BEAMS, Anne-Marie Pointu, G. Modreanu, E. Dewald, M. Ganciu, N.B. Mandache, G. Musa, M. Nistor, C. Penache, D. Penache, Ioan-Iovitz Popescu, M. Udrea, Romanian Rep. Phys., 50 (1998)
• 52R. RANKS WITHIN DISCIPLINE AND AVERAGE IMPACT FACTORS OF 1718 JOURNALS OF PHYSICS AND OF ALLIED SCIENCES, Ioan-Iovitz Popescu, Romanian Journ. Phys., 48, Suppl. I, 87-124 (2003)

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PAPERS IN INTERNATIONAL CONFERENCE PROCEEDINGS (P)
 

• 1P. RESEARCHES ON THE MECHANISMS OCCURRING AT THE CATHODE OF GLOW DISCHARGE (in German), E.Badareu and Ioan-Iovitz Popescu, Proceedings of the IV-th International Conference on Ionization Phenomena in Gases, Uppsala 1959, North-Holland Publ. Comp., Amsterdam, vol.II A, pp.301-305 (1960)
• 2P. ON RESONANT CHARGE TRANSFER IN IONIZED DENSE GASES, I.-Iovitz Popescu, Proceedings of the V-th International Conference on Ionization Phenomena in Gases, Munich 1961, North-Holland Publ. Comp., Amsterdam, vol.II, p.2054 (1962)
• 3P. ON THE MOVEMENT OF POSITIVE IONS IN NON-HOMOGENEOUS ELECTRIC FIELDS, G.Ciobanu and Ioan-Iovitz Popescu, Proceedings of the VI-th International Conference on Ionization Phenomena in Gases, Paris 1963, p.335 (1963)
• 4P. ON RESONANT CHARGE TRANSFER IN IONIZED DENSE GASES, L.Brandus and Ioan-Iovitz Popescu, Proceedings of the VI-th International Conference on Ionization Phenomena in Gases, Paris 1963, pp.343-346 (1963)
• 5P. CONSIDERATIONS ON THE ELECTRON DIFFUSION IN THE LOW-VOLTAGE ARC PLASMA, Ioan-Iovitz Popescu, L.Brandus, C.Moldovan, and G.Musa, Proceedings of the VII-th International Conference on Phenomena in Ionized Gases, Belgrade 1965, p.684 (1965)
• 6P. ATOMIC ABSORPTION OF ALKALI VAPORS BY THE SPACE CHARGE AMPLIFICATION METHOD, E.Badareu, Ioan-Iovitz Popescu, C.Ghita, and G.Musa, Proceedings of the VII-th International Conference on Ionization Phenomena in Gases, Belgrade 1965, p.372 (1965)
• 7P. A TIME-OF-FLIGHT ANALYSIS OF CESIUM IONS PRODUCED BY A LASER BEAM, Ioan-Iovitz Popescu, N.Niculescu, Proceedings of the VIII-th International Conference on Ionization Phenomena in Gases, Vienna 1967, p.320 (1967)
• 8P. STEPWISE EXCITATION AND IONIZATION OF CESIUM VAPORS, Denisa Popescu, Ioan-Iovitz Popescu, and J.Richter, Proceedings of the IX-th International Conference on Ionization Phenomena in Gases, Bucharest 1969, p. 22 (1969)
• 9P. ELECTRON TEMPERATURE MEASUREMENTS IN A HOLLOW-CATHODE ARC DISCHARGE IN CESIUM VAPORS, Ioan-Iovitz Popescu and O.Zamfir, Proceedings of the International Conference on Hollow-Cathode Discharges and their Applications, Orsay 1971, p.40 (1971)
• 10P. THE IMPORTANCE OF HYBRID RESONANCES IN THE MULTIPHOTON IONIZATION OF CESIUM AND RUBIDIUM, Denisa Popescu, C.B.Collins, B.W.Johnson, S.M.Curry, M.Y.Mirza, M.A.Chellehmalzadeh, J.A.Anderson, and Ioan-Iovitz Popescu, Proceedings of the 26-th Annual Gaseous Electronics Conference, Madison, Wisconsin 1973
• 11P. MULTIPHOTON EXCITATION OF ATOMIC RUBIDIUM WITH A TUNABLE DYE LASER, C.B.Collins, S.M.Curry, B.W.Johnson, M.Y.Mirza, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the 27-th Annual Gaseous Electronics Conference, Houston, Texas 1974
• 12P. FINE AND HYPERFINE STRUCTURE MEASUREMENTS OF TWO-PHOTON TRANSITIONS IN ATOMIC CESIUM WITH A TUNABLE DYE LASER, S.M.Curry, C.B.Collins, T.W.Hänsch, S.A.Lee, Denisa Popescu, Ioan-Iovitz Popescu, and A.L.Schawlow (recipient Nobel Prize in Physics, 1981), Proceedings of the VI-th Annual Meeting of the Division of Electron and Atomic Physics, Chicago, Illinois 1974, Bull.Am.Phys.Soc., 19, 1198 (1974)
• 13P. MULTIPHOTON IONIZATION THROUGH DISSOCIATIVE MOLECULAR STATES, C.B.Collins, S.M.Curry, M.Y.Mirza, B.W.Johnson, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the IX-th International Conference on the Physics of Electronic and Atomic Collisions, Seattle, Washington, 24-30 VII 1975, pp. 475-476 (1975)
• 14P. MULTIPHOTON IONIZATION OF Cs₂ DIMERS THROUGH DISSOCIATIVE MOLECULAR STATES, J.A.Anderson, C.B.Collins, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the 30-th Annual Gaseous Electronics Conference, Palo Alto, California 1977
• 15P. MULTIPHOTON IONIZATION THROUGH DISSOCIATIVE MOLECULAR STATES, J.A.Anderson, M.A.Chellehmalzadeh, M.E.Koch, C.B.Collins, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the International Conference on Multiphoton Processes, Rochester 1977, p.225 (1977)
• 16P. MULTIPHOTON IONIZATION OF Cs₂ DIMERS THROUGH DISSOCIATIVE MOLECULAR STATES, J.A.Anderson, C.B.Collins, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the 31-th Annual Gaseous Electronics Conference, Buffalo, New York 1978
• 17P. THE ENHANCEMENT OF GAMMA-RAY ABSORPTION IN THE RADIATION FIELD OF A HIGH POWER LASER, C.B.Collins, S.Olariu, M.Petrascu, and Ioan-Iovitz Popescu, Proceedings of the Europhysics Study Conference on Multiphoton Processes, Bénodet 1979
• 18P. A MULTIPHOTON TECHNIQUE FOR THE DISSOCIATIVE SPECTROSCOPY OF SIMPLE MOLECULES, C.B.Collins, J.A.Anderson, F.W.Lee, P.A.Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the International Conference on Lasers '79, Orlando, Florida 1979, edited by V.J.Corcoran, S.T.S. Press, McLean, VA, pp.185-189 (1980)
• 19P. MULTIPHOTON TECHNIQUE FOR DISSOCIATIVE SPECTROSCOPY OF SIMPLE MOLECULES, C.B.Collins, F.W.Lee, J.A.Anderson, P.A.Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the 11-th International Quantum Electronics Conference, Boston, Massachusetts 1980, Jour. Optical Society of America, 70, 628 (1980)
• 20P. TUNING OF GAMMA-RAY PROCESSES WITH HIGH-POWER OPTICAL RADIATION, C.B.Collins, S.Olariu, and Ioan-Iovitz Popescu, Proceedings of the 11-th International Quantum Electronics Conference, Boston, Massachusetts 1980, Jour. Optical Society of America, 70, 642 (1980)
• 21P. C.B.Collins, F.W.Lee, H.Golnabi, P.A.Vicharelli, F.Davanloo, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the International Conference on Lasers '80, edited by C.B.Collins, S.T.S. Press, McLean, VA, pp.741-747 (1981)
• 22P. P.A.Vicharelli, C.B.Collins, F.W.Lee, H.Golnabi, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the International Conference on Lasers '80, edited by C.B.Collins, S.T.S. Press, McLean, VA, pp.748- 753 (1981)
• 23P. MODELING OF OPTICAL IMPEDANCE SPECTROSCOPY, W.M.Tepfenhart, C.B.Collins, Denisa Popescu, Ioan-Iovitz Popescu, and C. Stanciulescu, Proceedings of the International Conference on Lasers '81, New Orleans, Louisiana 1981, edited by C.B.Collins, S.T.S. Press, McLean, VA (1981)
• 24P. STATE-SELECTIVE PHOTOLYSIS OF Cs₂ AND CsKr , C.B.Collins, F.W.Lee, H.Golnabi, F.Davanloo, O.Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the 33-rd Annual Gaseous Electronics Conference, Norman, Oklahoma 1980, Bull.Am.Phys.Soc., 26, 727 (1981).
• 25P. STATE-SELECTIVE PHOTOLYSIS OF CsKr AND Cs₂Kr , C.B.Collins, F.W.Lee, H.Golnabi, F.Davanloo, P.Vicharelli, Denisa Popescu, and Ioan-Iovitz Popescu, Proceedings of the 34-th Annual Gaseous Electronics Conference, Boston, Massachusetts 1981, Bull.Am.Phys.Soc., 27, 113 (1982)
• 26P. PROSPECTS OF THE PUMPING OF A GAMMA-RAY LASER WITH INTENSE OPTICAL RADIATION, C.B.Collins, F.W.Lee, D.M.Shemwell, B.D.DePaola, S.Olariu, and Ioan-Iovitz Popescu, Proceedings of the 12-th International Quantum Electronics Conference, Munich 1982, Appl.Phys. B, 28, 203 (1982)
• 27P. MAGNETIC EFFECTS IN RADIATIVELY ASSISTED INELASTIC COLLISIONS, I.Schneider, W.M.Tepfenhart, Ioan-Iovitz Popescu, C.B.Collins, and L.Barbu, Proceedings of the International Conference and School "Lasers and Applications", Bucharest 1982, Central Institute of Physics Press, vol.2, 349 (1982)
• 28P. THE DIRECT DISSOCIATIVE RECOMBINATION OF THE HYDROGEN MOLECULAR ION AT LOW ENERGIES, I.Schneider, I.N.Mihailescu, L.Nanu, and Ioan-Iovitz Popescu, Proceedings of the International Conference on Plasma Physics, Lausanne 1984, edited by M.Q.Tran and M.L.Sawley, 2, 336 (1984)
• 29P. THE DIRECT DISSOCIATIVE RECOMBINATION OF THE HYDROGEN MOLECULAR ION AT LOW ENERGIES, I.Schneider, I.N.Mihailescu, L.Nanu, and Ioan-Iovitz Popescu, Second International Conference on Trends in Quantum Electronics, Bucharest 1985, Europhysics Conference Abstracts, Edited by S.Methfessel, p.366 (1985)
• 30P. OPTOGALVANIC SPECTROSCOPY, Ioan-Iovitz Popescu, Proceedings of the Second Europhysics International Conference on Trends in Quantum Electronics, Bucharest 1985, Editors A. M. Prokhorov and I. Ursu, Central Institute of Physics, Bucharest, and Springer, Berlin, pp.391-442 (1986)
• 31P. LOW-TEMPERATURE LASER-PRODUCED ALUMINIUM PLASMA: I. RATE COEFFICIENTS FOR ELECTRON-IMPACT NON-RADIATIVE PROCESSES INVOLVING NEUTRAL ALUMINIUM ATOMS, I.Schneider, V.Stancalie, I.N.Mihailescu, I.Apostol, Ioan-Iovitz Popescu, C.Vasilescu, and V.P.Ageev, Third International Conference on Trends in Quantum Electronics, Bucharest 1988, Book of Abstracts, Edited by I. Ursu and A.M. Prokhorov, p.71 (1988)
• 32P. LOW-TEMPERATURE LASER-PRODUCED ALUMINIUM PLASMA: II. RATE COEFFICIENTS FOR RADIATIVE PROCESSES INVOLVING NEUTRAL ALUMINIUM ATOMS, I.Schneider, I.N.Mihailescu, A.Ciocan, C.Gutu, L.Pateopol, Ioan-Iovitz Popescu, C.Vasilescu, and V.P.Ageev, Third International Conference on Trends in Quantum Electronics, Bucharest 1988, Book of Abstracts, Edited by I.Ursu and A.M.Prokhorov, p.73 (1988)
• 33P. OPTICAL METHODS FOR TRANSIENT PLASMA STUDIES BY MULTICHANNEL TEA NITROGEN LASER, I.Ursu, Ioan-Iovitz Popescu, M.Ivascu, I.Baltog, I.Mihut, V.Zambreanu, and V.Zoita, Proceedings of the Third International Conference on Trends in Quantum Electronics, Bucharest 1988, SPIE (Society of Photo-Optical Instrumentation Engineers), 1033, pp.418-423 (1989)
• 34P. DISSOCIATIVE RECOMBINATION IN HYDROGEN AND NOBLE GASES AT LOW ENERGIES, I.Schneider, I.N.Mihailescu, Ioan-Iovitz Popescu, and A.Tamulis, Proceedings of the XIX-th International Conference on Physics in Ionized Gases, Belgrade 1989, Edited by J.Labat, p.578 (1989)
• 35P. LOW-TEMPERATURE LASER-PRODUCED ALUMINIUM PLASMA: RATE COEFFICIENTS AND KINETICS, F.Schneider, I.N.Mihailescu, A.Ciocan, A.Pop, V.Stancalie, I.Apostol, Ioan-Iovitz Popescu, C.Vasilescu, and V.P.Ageev, Proceedings of the XIX-th International Conference on Physics in Ionized Gases, Belgrade 1989, Edited by J.Labat, p.586 (1989)
• 36P. INTENSE PULSED ELECTRON BEAMS CREATED BY HOLLOW CYLINDRICAL CATHODES, M.Ganciu, Anne-Marie Pointu, G.Musa, and Ioan-Iovitz Popescu, Proceedings of the Third International Workshop on Transient Hollow Cathode Discharge Phenomena, Paris 1994
• 37P. INTENSE PULSED ELECTRON BEAMS CREATED BY SUPERPOSITION OF TWO DISCHARGES, M.Ganciu, Anne-Marie Pointu, G.Musa, Ioan-Iovitz Popescu, Proceedings of the XII-th European Sectional Conference on Atomic and Molecular Physics of Ionized Gases (ESCAMPIG), Noordwijkerhout1994
• 38P. A HIGH DENSITY PULSED ION TRAP, M.Ganciu, Ioan-Iovitz Popescu, V.Zoran, and Anne-Marie Pointu, 7-th International Conference on the Physics of Highly Charged Ions, Vienna 1994
• 39P. POPULATION MECHANISM OF ATOMIC HYDROGEN IMPURITIES IN NOBLE GAS AFTERGLOW, M.Surmeian, C.Diplasu, Ioan-Iovitz Popescu, G.Musa, and C.B.Collins, ROMOPTO, Bucharest 1994, SPIE (Society of Photo-Optical Instrumentation Engineers), 2461, 10 (1995)
• 40P. ON THE INFLUENCE OF CATHODE GEOMETRY UPON ELECTRON BEAMS PRODUCED BY PREIONIZATION CONTROLLED PSEUDOSPARKLIKE DISCHARGES, M.Ganciu, Anne-Marie Pointu, N.B.Mandache, and Ioan-Iovitz Popescu, ROMOPTO, Bucharest 1994, SPIE (Society of Photo-Optical Instrumentation Engineers), 2461, 40 (1995)
• 41P. THE CHARACTERIZATION OF A PULSED INTENSE ELECTRON BEAM PRODUCED BY DIELECTRIC CYLINDRICAL HOLLOW CATHODE, N.B.Mandache, Anne-Marie Pointu, M.Ganciu, G.Musa, Ioan-Iovitz Popescu, E.Dewald, Magdalena Nistor, Proceedings of the XXII-th International Conference on Phenomena in Ionized Gases (ICPIG-22),Hoboken, New Jersey., USA, July 31 - August 4 (1995), 2, 121 (1995)
• 42P. EMISSION OF GAMMA RAYS BY ELECTRON-NUCLEAR DOUBLE TRANSITION S.Olariu, Ioan-Iovitz Popescu, J.J.Carroll, and C.B.Collins, NATO First International Gamma-Ray Laser Workshop, Predeal '95, August 19-23 (1995)
• 43P. X-RAY GENERATION IN INVERSE CAPILLARY DISCHARGES FOR GAMMA-RAY LASER PUMPING, V.Zoran, M.Ganciu, Anne-Marie Pointu, C.B.Collins, and Ioan-Iovitz Popescu, NATO First International Gamma-Ray Laser Workshop, Predeal '95, August 19-23 (1995)
• 44P. THE ROLE OF MULTIELECTRODE GEOMETRY IN GENERATION OF PULSED ELECTRON BEAMS BY SUPERPOSITION OF TWO DISCHARGES, E.Dewald, M.Ganciu, N.B.Mandache, G.Musa, Magdalena Nistor, Anne-Marie Pointu, and Ioan-Iovitz Popescu, XIII-th European Sectional Conference on Atomic and Molecular Physics of Ionized Gases (ESCAMPIG), Poprad, High Tatras, Slovak Republic, August 27-30, 1996, vol. 20E, Part A, p.201 (1996); SPACE AND TIME EVOLUTION OF ARGON IONS GENERATED BY A PULSED ELECTRON BEAM, G. Modreanu, M. El Bezzari, A. M. Pointu, Y. Vitel, M. Ganciu, M.V. Udrea, G. Musa, and Ioan-Iovitz Popescu, same ESCAMPIG Conference(1996)
• 45D A SCANNING POINT-LIKE X-RAY SOURCE USING TRANSIENT HOLLOW CATHODE DISCHARGES, D.Penache, M.C,Penache, Magdalena Nistor, H.Grecu, M.Ganciu, Anne-Marie Pointu, M.Skowronek, Ioan-Iovitz Popescu, and V.Zoran, 17-th International Conference on X-Rays and Inner-Shell Processes, Hamburg, Germany, September 9-13, 1996, Abstracts, p.363 (1996)
• 46P. TIME AND SPACE RESOLVED ENERGY DISTRIBUTION OF AN ELECTRON BEAM PRODUCED IN A FILAMENTARY TRANSIENT DISCHARGE, G.Modreanu, M.Ganciu, N.B.Mandache, Anne-Marie Pointu, E.Dewald, Magdalena Nistor, Ioan-Iovitz Popescu, and M.V.Udrea, Proceedings of the XXIII-th International Conference on Phenomena in Ionized Gases XXIII, Toulouse, France, July 17-22, 1997, II, 50-51 (1997)
• 47P. INTENSE PULSED ELECTRON BEAMS PRODUCED IN MULTIGAP AND SINGLE GAP PCOHC, E.Dewald, K.Frank, Anne-Marie Pointu, D.H.H.Hoffmann, R.Stark, M.Ganciu, N.B.Mandache, Magdalena Nistor, and Ioan-Iovitz Popescu, Proceedings of the XXIII-th International Conference on Phenomena in Ionized Gases XXIII, Toulouse, France, July 17-22, 1997, II, 52-53 (1997)
• 48P. PSEUDOSPARK AND PCOHC PRODUCED ELECTRON BEAMS: A COMPARATIVE STUDY, E.Dewald, K.Frank, D.H.H.Hoffmann, R.Stark, M.Ganciu, N.B.Mandache, Magdalena Nistor, Anne-Marie Pointu, and Ioan-Iovitz Popescu, Proceedings of the XXII-th International Conference on Gas Discharges and their Applications, Greifswald, Germany, 8-12 September 1997, 1, 334-337 (1997)
• 49P. FILAMENTARY X-RAY SOURCE BY "CRUISE EFFECT", M.Ganciu, C.B.Collins, Maria-Cristina Penache, D.Penache, V.Zoran, and Ioan-Iovitz Popescu, Proceedings of the First International Induced Gamma Emission Workshop, Predeal, Romania, August 16-20, 1997, 198-202 (1999)
• 50P. INTENSE ELECTRON BEAMS IN OPEN ENDED HOLLOW CATHODE TRANSIENT DISCHARGES FOR TABLE TOP X-RAY SOURCES, N.B.Mandache, Magdalena Nistor, Ioan-Iovitz Popescu, S.Udrea, M.Ganciu, G.Modreanu, Anne-Marie Pointu, E.Dewald, K.Frank, and D.H.H.Hoffmann, Proceedings of the First International Induced Gamma Emission Workshop, Predeal, Romania, August 16-20, 1997, 203-211 (1999)
• 51P. CORONA DISCHARGE INTERACTION WITH A SILICONE OIL AND SILICAGEL SPHERES MIXTURE, Andreea Groza, M.Ganciu, Th.Ionescu Bujor, Ioan-Iovitz Popescu, M.Ilies, and A.T.Balaban, Proceedings of the XXIVth International Conference on Phenomena in Ionized Gases (ICPIG), Warsaw, Poland, July 11-16, 1999, vol.II, 127-128 (1999)
• 52P. ELECTRON ENERGY SPECTRA OF AN OPEN ENDED PIN-HOLLOW CATHODE TRANSIENT DISCHARGE BY MAGNETIC ANALYSIS, Magdalena Nistor, N.B.Mandache, E.Dewald, M.Ganciu, Ioan-Iovitz Popescu, Anne-Marie Pointu, and Y.Vitel, Proceedings of the XXIVth International Conference on Phenomena in Ionized Gases (ICPIG), Warsaw, Poland, July 11-16, 1999, vol.III, 29-30 (1999)
• 53P. ELECTRON BEAMS GENERATED IN HOLLOW CATHODE LOW PRESSURE TRANSIENT DISCHARGES, Anne-Marie Pointu, G. Modreanu, M. Ganciu, N.B. Mandache, Magdalena Nistor, and Ioan-Iovitz Popescu, XXIVth International Conference on Phenomena in Ionized Gases (ICPIG), Warsaw, Poland, July 11-16, 1999, special issue for Invited Papers to be published in Journal of Technical Physics, Polish Academy of Sciences(2000)
• 54P.GAMMA-RAY TRANSITIONS INDUCED IN NUCLEAR SPIN ISOMERS BY X-RAYS, C.B. Collins, N.C. Zoita, A.C. Rusu, M.C. Iosif, D.T. Camase, F. Davanloo, J.-M. Pouvesle, R. Dussart, V.I. Kirischuk, N.V. Strilchuk, C.A. Ur, Ioan-Iovitz Popescu, and F.J. Agee, X-Ray Lasers 2000, 7th International Conference on X-Ray Lasers, Saint-Malo, France
June 19-23 (2000), Journal de Physique IV (Proceedings), Vol. 11, Pr 2-437 (July 2001)
• 55P. A NEW METHOD FOR THE DETERMINATION OF THE TEMPORAL AFTERGLOW CONDUCTIVITY, Ani Surmeian, C. Diplasu, G. Musa, and Ioan-Iovitz Popescu, Proceedings of the XXVth International Conference on Phenomena in Ionized Gases (ICPIG), July 17-22, 2001, Nagoya, Japan, accepted paper (2001)

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A COLLECTION OF CITATIONS BY NOBEL LAUREATES:

BLOEMBERGEN, LAMB, PROKHOROV, SCHAWLOW, YANG

• T. W. Hänsch, K. C. Harvey, G. Meisel, A. L. Schawlow (1981 Nobel Prize in Physics for laser spectroscopy), "Two-photon spectroscopy of Na 3S-4D without Doppler broadening using a cw dye laser", Opt.Commun., vol. 11, 50 (1974). Page 50: "Two-photon transitions have been investigated theoretically as early as 1929 [cit. papers of Maria Goeppert-Meyer (1929, 1931)]. Experimental observations in the visible have become possible, however, only since the advent of strong laser sources [cit. our paper [20], C. B. Collins et al., Phys. Rev. A, vol. 8, 2197 (1973)]. �We believe that our experiment is the first demonstration of the extremely high resolution obtainable by this phenomenon [Foot Note: Very recently we learned that Levenson and Bloembergen at Harvard have also observed two-photon transitions without Doppler broadening. They observed the Na 3S-5S transition, using a nitrogen-laser-pumped pulsed dye laser]... Our experiment opens the way to numerous interesting spectroscopic studies of atoms and molecules. The new technique complements the methods of laser saturation spectroscopy and is particularly attractive because it allows us to study forbidden lines and to reach high lying states at twice the laser photon energy. It vastly extends the number of atoms and molecules which can be studied with high resolution, using CW dye lasers of limited tuning range."

NOTE: In the same year (1974) we presented a joint report [12P]: "Fine and hyperfine structure measurements of two photon transitions in atomic cesium with a tunable dye laser", S. M. Curry, C. B. Collins, T. W. Hänsch, S. A. Lee, Denisa Popescu, I.-I. Popescu and A. L. Schawlow (1981 Nobel Prize in Physics for laser spectroscopy), Sixth Annual Meeting of the Division of Electron and Atomic Physics, Chicago, Illinois, 1974, Bull. Am. Phys. Soc., vol. 19, 1198 (1974), having the following abstract: "Observations have been made of the fine and hyperfine structure of two photon transitions in atomic cesium excited by a nitrogen laser pumped narrow-band dye laser [cit. T. W. Hänsch, Appl.Optics, vol.11, 895 (1972)] and detected by a space charge limited cesium vapor photodiode [cit. our paper [19], Popescu et al., Phys.Rev. A, vol.8, 1666 (1973)]. Transitions have been observed from the 6S ground state to selected higher lying nS Rydberg levels up to n=14 and nD levels to n=19. Line strength ratios of the fine and hyperfine structure components have been measured and compared with theoretical predictions."
 

• N. Bloembergen (1981 Nobel Prize in Physics for laser spectroscopy), M. D. Levenson, "Doppler-Free Two-Photon Absorption Spectroscopy", Chap.8, page 315 in High-Resolution Laser Spectroscopy, ed. K. Shimoda, Topics in Applied Physics, vol. 13, Springer, Berlin (1976). Page 347: "Detection Techniques. ...While the technology of quantum detection is quite advanced, situations do occur when it cannot be used. One can imagine cases where the dominant decay route for an excited state does not involve the radiation of any detectable quantum. In these situations, detection techniques developed for other purposes can be applied to Doppler-free multi-quantum spectroscopy. One well-developed technique of this sort relies upon photoionization of an excited species. Photoionization is quite likely to occur in multi-quantum absorption experiments in any case. The ion produced can be detected with high efficiency in space charge ionization diode, or by a secondary emission electron multiplier [cit our paper [19], Denisa Popescu et al., Phys. Rev. A, vol. 8, 1666 (1973); also Marr and Wherrett (1972), Cagnac et al. (1973), Hotop et al. (1973)]. The required electrodes must be designed into the optical absorption cell, but the outputs of these detection devices have many of the same characteristics as quantum detectors." 

• M. Prokhorov (1964 Nobel Prize in Physics for Quantum Electronics), "Preface", Proc. Int. Conf. on Multiphoton Processes, Rochester, USA, June 1977, editors G. Mainfray, J. Eberly, and P. Lambropoulos, Wiley Interscience, New York (1978). Page 5 of the Preface: "In the case of resonance, of greatest importance are perturbations of the resonance state associated with induced bound-bound and bound-free transitions. As for ionization, resonance is interesting because of a sudden increase in the cross-section. The upsurge of interest devoted to this phenomenon is attributed however, to its applicability in diagnostics of the atomic spectrum. One of the possibilities here is to use rather weak fields where the perturbation of the resonance state is less than its natural width. Under such conditions, by varying the light frequency and by observing the resonant increase of ion emission, one can perform detailed spectroscopic studies of highly-excited atomic states. The possibilities opened up by this method - the so called resonance ionization spectroscopy - are evident from a series of works by Collins, Popescu and their collaborators [cit. our paper [21], Denisa Popescu et al., Phys. Rev. A, vol. 9, 1182 (1974)]."

• D. R. Lyons, A. L. Schawlow (1981 Nobel Prize in Physics for laser spectroscopy), G. Y. Yan, "Doppler-free radiofrequency optogalvanic spectroscopy", Opt. Commun., vol. 38, 35 (1981). Page 35: "Regenerative detectors have long been employed to detect small impedance changes, particularly for measuring phenomena such as nuclear magnetic and nuclear quadrupole resonances (Schawlow 1954). Any oscillator automatically adjusts its level of oscillation so that losses are just balanced by the regenerative amplification. If the losses are increased slightly, the oscillator amplitude is correspondingly decreased, and this produces an observable change in the oscillator anode current. ...Regenerative detection has been reported for Doppler-broadened lines by Stanciulescu et al. [cit. our paper [29], C. Stanciulescu et al., Appl. Phys. Lett., vol. 37, 888 (1980)]. Radio-frequency oscillators have the advantage that they can maintain discharges at low pressures, minimizing pressure broadening. Electrodeless radiofrequency discharges are particularly suitable for spectroscopy of scarce or corrosive gases. In our experiment, we have used a Colpitts regenerative oscillator with a triode 6A4F (fig.1)."

• G. P. Morgan, A. L. Schawlow (1981 Nobel Prize in Physics for laser spectroscopy, 1981), "Two-photon resonances in a sodium-potassium mixed alkali vapor", J. Opt. Soc. Am. B, vol. 3, 1033 (1986). Pages 1034-1036: "Two-photon hybrid resonances in K vapor. During the piecewise search for Doppler-free cw two-photon transitions in Na-K, five strong Doppler-broadened UV signals were observed at laser wavelengths corresponding to excited-state 4P-7S and 4P-5D transitions in atomic K. The strongest transition observed, corresponding to the 4 P-7 S transition in K, is presented in Fig. 3. The Doppler width of 1.5 GHz at 430 K (D_n =1.2 GHz; K vapor pressure is 5 mTorr) is comparable with that observed for one-photon transitions in atomic K, but it could be pressure broadened to 2.7 GHz by increasing the temperature to 570 K (Dn =1.4 GHz, p=300 mTorr). A Lamb dip was observed, indicating that the transition is saturated. The observed transitions along with the corresponding excited-state absorption frequencies in K are listed in Table 3. It it believed that these signals are due to hybrid resonances similar to those first reported by Collins et al. [cit. our paper [22], C. B. Collins et al., Phys. Rev. A, vol. 10, 813 (1974)], who detected multiphoton ionization of Cs through photolysis of Cs₂ . �We believe that we are the first to observe these hybrid transitions in K vapor by using a narrow-band cw dye laser and optical detection techniques. Figure 4 (Excitation and fluorescence channels for hybrid resonances in K vapor) presents the steps involved in the two-step absorption process. One photon is absorbed by the dimer K₂ , exciting it to a dissociating state 100-200 cm above the A- and B-state dissociation limits. This produces an excited 4P atom that subsequently absorbs a second photon to the 5D or 7S atomic state. The excited atom can relax to the 5P or 6P level, which then can decay to the ground 4S state, emitting UV light at 4044 and 3447 Å, respectively. ...IR laser emission in K vapor pumped with a pulsed dye laser at 6911 and 6939 Å has been reported by Wang et al. (1984) in which the excitation process is also by two-photon hybrid resonances. The first photon excites K₂ dimers to highly excited vibrational levels in the A and B states that are below the dissociation limit. This is followed by collisional transfer of the excitation to the 4P levels of a K atom, which is subsequently excited to the 6S level by the second photon. Similar IR laser emission is to be expected for the hybrid resonances reported here."

• G. Y. Yan, K. I. Fujii, A. L. Schawlow (1981 Nobel Prize in Physics for laser spectroscopy, 1981), "Relaxation-oscillator detection of optogalvanic spectra", Opt. Lett., vol.15, 142 (1990). Page 142: "In optogalvanic spectroscopy, the electrical impedance of a gas discharge is altered when it is illuminated by light from laser tuned to one of the wavelengths emitted or absorbed by the gas [cit. our paper [29], C. Stanciulescu et al., Appl. Phys. Lett., vol. 38, 888 (1980); also the papers with A. L. Schawlow�s co-authorship, Phys. Rev. Lett., vol. 42, 1046 (1979), Opt. Lett., vol. 4, 230 (1979), and Opt. Commun., vol. 38, 35, (1981)]. This occurs because the optical excitation alters the population of excited atomic states, which are more easily ionized to provide current-carrying free electrons, the closer they are to the ionization limit [cit. again our paper [29], C. Stanciulescu et al., Appl. Phys. Lett., vol. 38, 888 (1980)]." 

• W. E. Lamb, jr. (1955 Nobel Prize in Physics for the �Lamb shift�), R. R. Schlicher, M. O. Scully, "Matter-field interaction in atomic physics and quantum optics", Phys. Rev. A, vol. 36, 2763-2777 (1987). Page 2770: "� For the emission of two photons with frequencies n₁ and n₂ the E.r calculation gives Eq. (B3), whereas simply replacing the E.r matrix elements by the p.A matrix elements according to Eq. (2.15) results in Eq. (B4). In order to show that the expressions (B3) and (B4) are the same, one has to exploit not only the energy conservation as expressed by the d -function but also the completeness of thheee intermediate states |n. In a similar fashion the equivalence of both approaches can also be shown for a three-photon interaction (G. Grynberg, E. Giacobino, 1979) as well as for multiphoton processes of arbitrary order [cit. our paper [27], S. Olariu et al., Phys. Rev. D., vol. 20, 3095 (1979); also K. Haller, R. B. Sohn, 1979; Y. Aharonov, C.K. Au, 1979; E. Kazes et al., 1982]." 

• C. N. Yang (Chen Ning Yang won in 1957 the Nobel Prize in Physics for the parity laws), "Vector potential, gauge field and connection on a fiber bundle" (plenary talk), Proc. of the First Int. Conf. on Frontiers of Physics, Shantou, China, 1995, Editors L.-F. Li, K. K. Phua, S. S. M. Wong, and B.-L. Young, ISBN 981-02-3119-9, 1096 pp (1997). "A number of basic concepts in contemporary physics have deep relations with each other. In this talk I shall trace the early origins of some of these concepts. � References:
1. Scientific Papers of J. C. Maxwell, ed. W. D. Niven, Vol. 1, p. 155. [This paper was published in 1856.]
2. Scientific Papers of J. C. Maxwell, p. 451 [This paper was published in 1861-1862.]
3. Scientific Papers of J. C. Maxwell, p. 526 [This paper was published in 1865.]
4. See, however, Daniel M. Siegel: Innovation in Maxwell�s Electromagnetic Theory, Molecular Vortices, Displacement Currents, and Light. Cambridge University Press, 1991
5. J. C. Maxwell. A Treatise on Electricity and Magnetism, 1873
6. O. Heaviside. Electromagnetic Theory. 1893 (This quote appeared in Section 65 of the third edition of this book)
7. E. Whittaker in Historical Forward to an edition of Heaviside�s book, Reference 6, 1928
8. Chen Ning Yang in Hermann Weyl 1885-1985. Springer-Verlag, 1986
9. Footnote 14 in Reference 8 above
10. C. N. Yang and R. L. Mills. Phys. Rev, 1954, 95:631
11. C. N. Yang and R. L. Mills. Phys. Rev, 1954, 96:191
12. The sense of this passage would be more correctly rendered if after the words "not consistent" two words are inserted so as to read "not consistent in spirit".
13. Chen Ning Yang. Phys. Rev. Letters, 1974, 33: 445
14. Y. Aharonov and D. Bohm. Phys. Rev, 1959, 115: 485 
15. See also S. Olariu and I. Iovitzu Popescu. Rev. Mod. Phys., 1985, 57: 339, for a review. I want to thank B. Nagel for pointing out to me this review paper.
16. A. Tonomura et al. Phys. Rev. B, 1982, 25: 6799, Phys. Rev. Lett., 1986, 56: 792
17. T. T. Wu and Chen Ning Yang. Phys. Rev. D, 1975, 12: 3845
18. Actually even in classical EM, topological implication was already there when one discusses Dirac�s monopole theory. As shown in T. T. Wu and Chen Ning Yang. Phys. Rev. D 14 (1976) 437, the simultaneous presence of the electron (e) and Dirac�s monopole (g) necessitates an action integral that is not single valued. It is definable only modulo 4p eg. Since in quantum mechanics integrand in the path integral is exp[i(action)/h ]. The whole theory is meaningful if and only if 4p eg/h = 2p (integer), which is Dirac�s quantization condition.
19. E. Schrodinger, Zs. f. Physik 12 (1922), 13. Schrodinger�s Streckenfaktor (4) was his interpretation of the Weyl expression (1). This latter expression appeared explicitly in the first of the three papers of Weyl on gauge theory. The titles of these three papers are: Pure infinitesimal geometry, Gravitation and electricity, A new generalization of relativity theory. All three papers have been reprinted in Weyl�s Gesammelte Abhandlungen, vol. 2 (Springer, 1968).
20. V. V. Raman and P. Forman. Hist. Studies Phys. Sci, 1969, 1: 291
21. P. Hanle, Isis, 1977, 68: 606, Am. J. Phys. 1979, 47: 644
22. A. Einstein in Ideas and Opinions, p. 270, Dell Publishing, 1973."

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ASSISTING THE BIRTH OF OPTOGALVANIC

AND LASER SPECTROSCOPY

19 selected articles we published on this topic (1969-1991)

1. Denisa Popescu, Ioan-Iovitz Popescu, and J. Richter, ABSORPTION SPECTROSCOPY OF EXCITED CESIUM ATOMS, Zs. Phys. (in German), vol. 226, 160-174 (1969)
 

2. Denisa Popescu, M. L. Pascu, C. B. Collins, B. W. Johnson, and Ioan-Iovitz Popescu, USE OF SPACE CHARGE AMPLIFICATION TECHNIQUES IN THE ABSORPTION SPECTROSCOPY OF Cs AND Cs₂ ,Phys. Rev. A, vol. 8, 1666-1672 (1973)
 

3. C. B. Collins, B. W. Johnson, Denisa Popescu, G. Musa, M. L. Pascu, and Ioan-Iovitz Popescu, MULTIPHOTON IONIZATION OF MOLECULAR CESIUM WITH A TUNABLE DYE LASER, Phys. Rev. A, vol. 8, 2197-2201 (received 23 March 1973, published October 1973)
 

4. Denisa Popescu, C. B. Collins, B. W. Johnson, and Ioan-Iovitz Popescu, MULTIPHOTON EXCITATION AND IONIZATION OF ATOMIC CESIUM WITH A TUNABLE DYE LASER, Phys. Rev. A, vol. 9, 1182-1187 (received 16 April 1973, published March 1974)

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ASSISTING THE BIRTH OF THE GAMMA-RAY LASER
INDUCED GAMMA EMISSION FROM ISOMERIC NUCLEI

30 selected articles we published on this topic (1979-2004)

See more at essential isomer triggering reprints 

1. C. B. Collins, S. Olariu, M. Petrascu, and Ioan-Iovitz Popescu, ENHANCEMENT OF GAMMA-RAY ABSORPTION IN THE RADIATION FIELD OF A HIGH POWER LASER, Phys. Rev. Lett., vol. 42, 1397-1400 (1979)
 

2. C. B. Collins, S. Olariu, M. Petrascu, and Ioan-Iovitz Popescu, THE LASER-INDUCED RESONANT ABSORPTION OF GAMMA-RADIATION, Phys. Rev. C, vol. 20, 1942-1945 (1979)
 

3. S. Olariu, Ioan-Iovitz Popescu, and C.B. Collins, THE TUNING OF THE GAMMA-RAY PROCESS WITH HIGH POWER OPTICAL RADIATION, Phys. Rev. C, vol. 23, 50-63 (1981)
 

4. S. Olariu, Ioan-Iovitz Popescu, and C.B. Collins, MULTIPHOTON GENERATION OF OPTICAL SIDEBANDS TO NUCLEAR TRANSITIONS, Phys. Rev. C, vol. 23, 1007-1014 (1981)
 

5. C. B. Collins, F. W. Lee, D. M. Shemwell, B. D. DePaola, S. Olariu, and Ioan-Iovitz Popescu, THE COHERENT AND INCOHERENT PUMPING OF A GAMMA-RAY LASER WITH INTENSE OPTICAL RADIATION, J. Appl. Phys., vol. 53, 4645-4651 (1982)
 

6. S. Olariu, Ioan-Iovitz Popescu, and C. B. Collins, AMPLIFICATION OF GAMMA RADIATION FROM X-RAY EXCITED NUCLEAR STATES, Rev. Roum. Phys., vol. 27, 559-565 (1982); also available from Los Alamos E-Print Archive, paper 9907010 at the entry: http://arXiv.org/abs/nucl-ex/9907010
 

7. S. Olariu, M. Sorescu, Ioan-Iovitz Popescu, and C. B. Collins, NUCLEAR MULTIPHOTON TRANSITIONS INDUCED BY MODULATED HYPERFINE ELECTRIC FIELD GRADIENTS, Europhys. Lett., vol. 2, 725-732 (1986) [In August 2004 not yet available online]
 

8. C. B. Collins and L. A. Rivlin (Editors), Proceedings of the 1st International Gamma-Ray Laser Workshop (GARALAS�95), Predeal, Romania, 19-23 August 1995, a NATO Advanced Research Workshop (ARW); published in Hyper. Inter.,vol. 107 (1997). This volume presents a thorough review paper by C. B. Collins and J. J. Carroll, "Progress in the Pumping of a Gamma-Ray Laser" (pp. 3-42, including 78 references)
 

9. S. Olariu, Ioan-Iovitz Popescu, J. J. Carroll, and C. B. Collins, EMISSION OF GAMMA RAYS BY ELECTRON-NUCLEAR DOUBLE TRANSITION, Proc. 1st Int. Gamma-Ray Laser Workshop, GARALAS'95, Predeal, Romania, Hyper. Inter., vol. 107, 197-203 (1997)
 

10. V. Zoran, M. Ganciu, Anne-Marie Pointu, C. B. Collins, and Ioan-Iovitz Popescu, X-RAY GENERATION IN INVERSE CAPILLARY DISCHARGES FOR PUMPING,Proc. 1st Int. Gamma-Ray Laser Workshop, GARALAS'95, Predeal, Romania, Hyper. Inter., vol. 107, 415-430 (1997)
 

11. Ioan-Iovitz Popescu and C. A. Ur (Editors), Proceedings of the First International Induced Gamma Emission Workshop (IGE�97), Predeal, Romania, 16-20 August 1997, sponsored by Sandia National Laboratories and USAF European Office for Aerospace Research and Development (EOARD); published by Editura Metropol, Bucharest, ISBN 973-562-093-6 (1999). This volume presents an overview by C. B. Collins, "Essential Fundamentals of Quantum Nucleonics" (pp. 1-17)
 

12. M. Ganciu, C. B. Collins, M. C. Penache, D. Penache, V. Zoran, and Ioan-Iovitz Popescu, FILAMENTARY X-RAY SOURCE BY "CRUISE EFFECT", Proc. 1st Int. Induced Gamma Emission Workshop, IGE�97, Predeal, Romania, Editura Metropol, Bucharest, 198-202 (1999)
 

13. N. B. Mandache, Magdalena Nistor, Ioan-Iovitz Popescu, S. Udrea, M. Ganciu, G. Modreanu, Anne-Marie Pointu, E. Dewald, K. Frank, and D. H. H. Hoffmann, INTENSE ELECTRON BEAMS IN OPEN ENDED HOLLOW CATHODE TRANSIENT DISCHARGES FOR TABLE TOP X-RAY SOURCES, Proc. 1st Int. Induced Gamma Emission Workshop, IGE�97, Predeal, Romania, Editura Metropol, Bucharest, 203-211 (1999)
 

14. N. B. Mandache, Anne-Marie Pointu, E. Dewald, Magdalena Nistor, M. Ganciu, G. Musa, and Ioan-Iovitz Popescu, THE CHARACTERIZATION OF PREIONIZATION-CONTROLLED ELECTRON BEAMS PRODUCED IN OPEN-ENDED HOLLOW-CATHODE TRANSIENT DISCHARGES, Plasma Sources Sci. Technol., vol. 6, 1-7 (1997)
 

15. E. Dewald, K. Frank, D. H. H. Hoffmann, R. Stark, M. Ganciu, N. B. Mandache, Magdalena Nistor, Anne-Marie Pointu, and Ioan-Iovitz Popescu, PULSED INTENSE ELECTRON BEAMS GENERATED IN TRANSIENT HOLLOW CATHODE DISCHARGES: FUNDAMENTALS AND APPLICATIONS, IEEE Trans. Plasma Sci., vol. 25, 272-278 (1997)
 

16. E. Dewald, M. Ganciu, N. B. Mandache, G. Musa, Magdalena Nistor, Anne-Marie Pointu, Ioan-Iovitz Popescu, K. Frank, D. H. H. Hoffmann, and R. Stark, THE ROLE OF MULTIELECTRODE GEOMETRY IN GENERATION OF PULSED INTENSE ELECTRON BEAMS IN PREIONIZATION-CONTROLLED OPEN ENDED HOLLOW CATHODE TRANSIENT DISCHARGES, IEEE Trans. Plasma Sci., vol. 25, 279-283 (April, 1997)
 

17. M. V. Udrea, Anne-Marie Pointu, G. Modreanu, M. Ganciu, Ioan-Iovitz Popescu, and N. B. Mandache, PULSED ELECTRON BEAMS IN LONG FILAMENTARY DISCHARGES, J. Phys. D: Appl. Phys., vol. 30, L33-L36 (1997)
 

18. E. Dewald, K. Frank, D. H. H. Hoffmann, M. Ganciu, N. B. Mandache, Magdalena Nistor, Anne-Marie Pointu, and Ioan-Iovitz Popescu, INTENSE ELECTRON BEAMS PRODUCED IN PSEUDOSPARKS AND PCOHC FOR BEAM-PLASMA INTERACTION EXPERIMENTS, Nucl. Instrum. Meth. A, vol. 415, 614-620 (1998)
 

19. C. B. Collins, F. Davanloo, M. C. Iosif, R. Dussart, J. M. Hicks, S. A. Karamian, C. A. Ur, Ioan-Iovitz Popescu, V. I. Kirischuk, J. J. Carroll, H. E. Roberts, P. McDaniel, and C. E. Crist, ACCELERATED EMISSION OF GAMMA RAYS FROM THE 31-YR ISOMER OF ¹⁷⁸Hf INDUCED BY X-RAY IRRADIATION, Phys. Rev. Lett., vol. 82, 695-698 (1999)
 

20 C. B. Collins, F. Davanloo, A. C. Rusu, M. C. Iosif, N. C. Zoita, D. T. Camase, J. M. Hicks, S. A. Karamian, C. A. Ur, Ioan-Iovitz Popescu, R. Dussart, J. M. Pouvesle, V. I. Kirischuk, N. V. Strilchuk, P. McDaniel, and C. E. Crist, STUDY OF THE GAMMA EMISSION FROM THE 31-YR ISOMER OF ¹⁷⁸Hf INDUCED BY X-RAY IRRADIATION, Phys. Rev. C, vol. 61, 054305(7) (18 April 2000)
 

21. C. B. Collins, F. Davanloo, M. C. Iosif, R. Dussart, J. M. Hicks, S. A. Karamian, C. A. Ur, Ioan-Iovitz Popescu, V. I. Kirischuk, J. M. Pouvesle, P. McDaniel, and C. E. Crist, STUDY OF GAMMA EMISSION FROM THE 31-YR ISOMER OF ¹⁷⁸Hf INDUCED BY X-RAY IRRADIATION, Phys. Atom. Nucl. (Yadernaya Fizika), vol. 63, 2067-2072 (2000)
 

22. G. Modreanu, N. B. Mandache, Anne-Marie Pointu, M. Ganciu, and Ioan-Iovitz Popescu, TIME - RESOLVED MEASUREMENT OF THE ENERGY DISTRIBUTION FUNCTION OF AN ELECTRON BEAM CREATED BY A TRANSIENT HOLLOW CATHODE DISCHARGE, J. Phys. D: Appl. Phys., vol. 33, 819-825 (2000)
 

23. C. B. Collins, N. C. Zoita, A. C. Rusu, M. C. Iosif, D. T. Camase, F. Davanloo, J. M. Pouvesle, R. Dussart, V. I. Kirischuk, N. V. Strilchuk, C. A. Ur, Ioan-Iovitz Popescu, F. J. Agee, SCALING OF GAMMA-RAY TRANSITIONS INDUCED IN NUCLEAR SPIN ISOMERS BY X-RAYS, Laser Phys., vol. 11, 1-5 (2001)
 

24. C. B. Collins, A. C. Rusu, N. C. Zoita, M. C.Iosif, D. T. Camase, F. Davanloo, C. A. Ur, Ioan-Iovitz Popescu, J. M. Pouvesle, R. Dussart, V. I. Kirischuk, N. V. Strilchuk, F. J. Agee, GAMMA-RAY TRANSITIONS INDUCED IN NUCLEAR SPIN ISOMERS BY X-RAYS, Hyper. Inter., vol. 135, 51-70 (2001)
 

25. C. B. Collins, N. C. Zoita, A. C. Rusu, M. C. Iosif, D. T. Camase, F. Davanloo, S. Emura, T. Uruga, R. Dussart, J. M. Pouvesle, C. A. Ur, Ioan-Iovitz Popescu, V. I. Kirischuk, N. V. Strilchuk, and F. J. Agee, TUNABLE SYNCHROTRON RADIATION USED TO INDUCE GAMMA-EMISSION FROM THE 31 YEAR ISOMER OF 178Hf, Europhys. Lett., vol. 57 (5), 677-682 (2002)
 

26. S. A. Karamian, J. Adam, D. V. Filossofov, D. Henzlova, V. Henzl, V. G.  Kalinnikov,  N. A. Lebedev, A. F. Novgorodov, C. B. Collins, Ioan-Iovitz Popescu, and C. A. Ur, ACCUMULATION OF THE 178m2Hf ISOMERIC NUCLEI THROUGH SPALLATION WITH INTERMEDIATE-ENERGY PROTONS OF TANTALUM AND RHENIUM TARGETS, PREPRINT E6-2001-249of the Joint Institute for Nuclear Research, Dubna, Russia, 26 pages (2001), Nuclear Instruments and Methods A, vol. 489, 448-468 (2002)
 

27. C. B. Collins, N. C. Zoita, F. Davanloo, S. Emura, Y. Yoda, T. Uruga, B. Patterson, B. Schmitt, J. M. Pouvesle, Ioan-Iovitz Popescu, V. I. Kirischuk, and N. V. Strilchuk, ACCELERATED DECAY OF THE 31-YR ISOMER OF HF-178 INDUCED BY LOW-ENERGY PHOTONS AND ELECTRONS, Laser Physics, 14 (2), 154-165 (2004)

28. S. A. Karamian, J. Adam, P. Chaloun, D. V. Filossofov, V. Henzl, D. Henzlova, V. G. Kalinnikov, N. A. Korolev, N. A. Lebedev, A. F. Novgorodov, C. B. Collins, Ioan-Iovitz Popescu, and C. A. Ur, YIELD OF RADIONUCLIDES AND ISOMERS PRODUCED IN THE FRAGMENTATION OF natW AND 186W (97%) TARGETS WITH PROTONS AT 630, 420 AND 270 MeV, Nuclear Instruments and Methods A, 527, 609-823 (2004) 

29. C. B. Collins, N. C. Zoita, F. Davanloo, S. Emura, Y. Yoda, T. Uruga, B. Patterson, B. Schmitt, J. M. Pouvesle, Ioan-Iovitz Popescu, V. I. Kirischuk, and N. V. Strilchuk, ACCELERATED GAMMA-EMISSION FROM ISOMERIC NUCLEI, Radiation Physics and Chemistry, 71, 619-625 (2004)

30. C. B. Collins, N. C. Zoita, F. Davanloo, Y. Yoda, T. Uruga, J. M. Pouvesle, and Ioan-Iovitz Popescu, NUCLEAR RESONANCE SPECTROSCOPY OF THE 31-YR ISOMER OF Hf-178,  Laser Physics Letters (Received: 20 October 2004; Accepted: 24 October 2004), Digital Object Identifier (DOI): 10.1002/lapl.200410154 (About DOI)

E-mail: iovitzu@gmail.com
Web site: http://www.iipopescu.com
Mirror site: http://alpha2.infim.ro/~ltpd/ iipopescu

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