Atomic, Molecular and Optical Physics

Ionisation Collisions

01 - R. O. Barrachina: Aproximación de dispersión múltiple y efectos de apantallamiento en el proceso de captura al continuo (Multiple Scattering Approximation and Screening Effects in the Capture to the Continuum effect), M.Sc. Thesis, Supervisor: Carlos R. Garibotti (Balseiro Institute, Bariloche, Argentina, 1982).

02 - R. O. Barrachina and C. R. Garibotti: Multiple-scattering treatment of the electron-capture to the continuum peak and comparison with experimental results for H+ - He collision, Physical Review A 28, 1821 (1983).

03 - C. R. Garibotti and R. O. Barrachina: Consequences on the electron capture to the continuum peak produced by a screening on the postcollisional electron projectile interaction, Physical Review A 28, 2792 (1983).

04 - R. O. Barrachina and W. Meckbach: Test of second Born contributions to the electron capture to the continuum, Physical Review Letters 52, 1053 (1984).

05 - R. O. Barrachina, G. C. Bernardi and C. R. Garibotti: Selection rules for electron transfer to the continuum in ion - atom collisions, Journal de Physique 46, 1671 (1985).

06 - R. O. Barrachina: Collisional electron capture to the continuum of neutral projectiles, Journal of Physics B 23, 2321 (1990).

07 - C. R. Garibotti and R. O. Barrachina: Continuum states in ion - atom collisions, Nuclear Instruments and Methods B 86, 96 (1994).

08 - R. G. Pregliasco, C. R. Garibotti and R. O. Barrachina: ECC cusp analysis, Nuclear Instruments and Methods B 86, 168 (1994).

09 - R. G. Pregliasco, I. Samengo and R. O. Barrachina: Angular Normalization of the Electron Transfer to the Continumm Peak, Nuclear Instruments and Methods B 86, 390 (1994).

10 - R. G. Pregliasco, C. R. Garibotti and R. O. Barrachina: Measurement and analysis of the ECC cusp structure, Journal of Physics B 27, 1151 (1994).

11 - V. D. Rodríguez and R. O. Barrachina: Longitudinal recoil-ion momentum distribution in ionization collisions by neutral projectiles near the kinematical threshold, Physical Review A 53, 3335 (1996).

12 - S. Suárez, R. O. Barrachina and W. Meckbach: Double scattering effects in the ionization spectrum produced by single energetic atomic collisions, Physical Review Letters 15, 474 (1996).

13 - S. Suárez, W. R. Cravero, R. O. Barrachina, C. R. Garibotti, W. Meckbach, R. Maier, M. Tobisch and K. O. Groeneveld: Evidence of double scattering processes in ion-atom ionization, in ``Two-Center effects in ion-atom collisions'', T. J. Gay and A. F. Starace, eds (AIP Conference Proceedings 362, 233 (1996)).

14 - R. O. Barrachina: Final-state interaction theory of cusp formation, Nuclear Instruments and Methods B 124, 198 (1997).

15 - S. Suárez, R. O. Barrachina, A. González and W. Meckbach: Effects of double scattering in electron emission spectra, Nuclear Instruments and Methods B 124, 358 (1997).

16 - A. Báder, L.Sarkadi, L.Víkor, M.Kuzel, P.A.Závodszky, T.Jalowy, K.O.Groeneveld, P.A.Macri and R. O. Barrachina: Observation of low-lying resonance states of He- at the 21S and 23S He thresholds, Physical Review A 55, 14 (1997).

17 - V. D. Rodríguez and R. O. Barrachina: Projectile angular distribution in He single ionization by proton impact as a function of the ejected electron energy, Physical Review A 57, 215 (1998).

18 - P. Focke, G. Bernardi, D. Fregenal, R. O. Barrachina and W. Meckbach: Coincidence study of electron transfer to the continuum process in H0 + Ar collisions at intermediate energies, Journal of Physics B 31, 289 (1998).

19 - P. Macri and R. O. Barrachina: Theory of electron capture into the continuum of neutral projectiles, Journal of Physics B 31, 1303 (1998).

20 - L. Sarkadi, K. Tökési and R. O. Barrachina: Electron capture to the continuum induced by dipolar interaction, Journal of Physics B 33, 847 (2000).

21 - R. O. Barrachina, J. Fiol, V. D. Rodríguez and P. Macri: Cusp formation and threshold effects in break-up collisions in "The Physics of Electronic and Atomic Collisions", edited by Y. Itikawa, K. Okuno, H. Tanaka, A. Yagishita, and M. Matsuzawa, 510 (American Institute of Physics, New York, 2000).

22 - J. Fiol, C. Courbin, R. O. Barrachina and V. D. Rodríguez: Classical description of threshold effects in ion-atom ionization collisions, Journal of Physics B 33, 5343 (2000).

23 - V. D. Rodríguez and R. O. Barrachina: Thomas mechanism in electron capture to the continuum, Physical Review A 62, 062716 (2000).

24 - J. Fiol, V. D. Rodríguez and R.O. Barrachina: Electron capture to the continuum by proton and positron impact, Journal of Physics B 34, 933 (2001).

25 - J. Fiol, C. Courbin, V. D. Rodríguez and R. O. Barrachina: Zero-energy resonances in break-up collisions, "Resonances in Few-Body Systems", edited by A. T. Kruppa and R. G. Lovas, en Few-Body Systems Suppl. 13, 46-55 (2001).

26 - J. Fiol, R. O. Barrachina and V. D. Rodríguez: Cusp formation in the single-particle momentum distributions of three-body continuum states, Journal of Physics B 35, 149 (2002).

27 - R. O. Barrachina and C. Courbin: Cusp formation in Classical Trajectory Monte-Carlo calculations of ion-impact ionization collisions, Journal of Physics B 35, 3157 (2002).

28 - R. Della Picca and R. O. Barrachina: Final-state interaction description of the autoionization of atoms by ion impact in the velocity matching regime, Nuclear Instruments and Methods B 205, 539 (2003).

29 - P. Macri and R. O. Barrachina: Extracting low-energy electron-atom scattering parameters from ionic measurements, Nuclear Instruments and Methods B 205, 543 (2003).

30 - R. O. Barrachina: Effects of breakup thresholds in the single-particle momentum distributions of a few-body continuum, "Few-Body Problems in Physics '02", edited by R. Krivec, B. Golli, M. Rosina and S. Sirca, in Few-Body Systems Suppl. 14, 159-162 (Springer-Verlag, Wien-New York, 2003)

31 - R. Della Picca y R. O. Barrachina: Estudio de la sección eficaz quíntuple diferencial en colisiones de ionización por impacto de positrones, Anales de la Asociación Física Argentina 15, 38 (2004).

32 - R. O. Barrachina and P. Macri: Extracting information about few-body break-up thresholds from high-energy collisions, Few-Body Systems 34, 175 (2004).

33 - R. O. Barrachina: General description of few-body break-up processes at threshold, Nuclear Instruments and Methods B 233, 19 (2005).

34 - R. O. Barrachina and L. Sarkadi: On the divergency problem of the ECC cusp: A final state interaction theory, Nuclear Instruments and Methods B 233, 260 (2005).

35 - R. Della Picca, J. Fiol, R. O. Barrachina: Investigation of Saddle Point electrons in positron-atom ionization collisions, Nuclear Instruments and Methods B 233, 270 (2005).

36 - L. Sarkadi and R. O. Barrachina: Divergency problem of the electron capture to the continuum cusp: Classical trajectory Monte Carlo simulation and experimental data, Physical Review A 71, 062712 (2005).

37 - R. Della Picca, J. Fiol, R. O. Barrachina and V. D. Rodríguez: Theory of ionization processes in positron-atom collisions, Nuclear Instrument and Methods B 247, 52 (2006).

38 - L. Sarkadi, R. O. Barrachina and P. Macri: Cusp Formation in Classical Trajectory Monte-Carlo Calculations of Single Atomic Ionization by the Impact of Neutral Projectiles, Journal of Physics: Conference Series 58, 219 (2007).

39 - P. A. Macri, V. D. Rodríguez and R. O. Barrachina: Ionization of Helium by fast and highly charged ions, Journal of Physics: Conference Series 58, 259 (2007).

40 - V. D. Rodríguez, P. A. Macri and R. O. Barrachina: Projectile focusing near the recoil-ion threshold, Journal of Physics: Conference Series 58, 255 (2007).

41 - R. O. Barrachina, P. A. Macri and J. Fiol: Threshold Effects in the Ionization of Atoms by Positron Impact, Nuclear Instrument and Methods in Physics Research B 266, 402 (2008).

42 - J. Fiol, P. Macri and R. O. Barrachina: Dynamics of collisions with positrons, Nuclear Instrument and Methods in Physics Research B 267, 206 (2009).

43 - R. O. Barrachina, F. Frémont, K. Fossez, D. Gruyer, V. Helaine, A. Lepailleur, A. Leredde, S. Maclot, G. Scamps and Jean-Yves Chesnel: Linewidth oscillations in a nanometer-size double-slit interference experiment with single electrons, Physical Review A 81, 060702 4 pp (2010).

44 - R. O. Barrachina and J. Fiol: Classical Trajectory Monte Carlo Calculation of the Fully Differential Cross Section for Positron Impact Ionization Collisions, Journal of Physics: Conference Series 199, 012022 5pp (2010).

45 - R. O. Barrachina, A. Delesque, R. Tricard, F. O. Navarrete, R. D. Picca, J. Fiol, V. D. Rodríguez: Recoil-Ion Momentum Distribution in Positron-Impact Ionization Collisions, M. Hori and W. G. Graham eds. "63rd Gaseous Electronic Conference & 7th International Conference on Reactive Plasmas, Conference Proceedings", KWP-111, 2 pages (Japan Society of Applied Physics, 2010) ISBN 978-4-86348-101-5.

46 - R. O. Barrachina and E. Altszyler: Multiple-Scattering Effects in Single Ionization Processes, M. Hori and W. G. Graham eds. "63rd Gaseous Electronic Conference & 7th International Conference on Reactive Plasmas, Conference Proceedings", KWP-112, 2 pages (Japan Society of Applied Physics, 2010) ISBN 978-4-86348-101-5.

47 - J. Fiol and R. O. Barrachina: Continuum-orientation phenomena in ionization by positron impact, Journal of Physics B: Atomic, Molecular and Optical Physics 44, 075205 (2011).

47 - J. Fiol and R. O. Barrachina: Labtalk (Research Highlights): Dynamical alignment of a continuum positrón-electron system, Journal of Physics B: Atomic, Molecular and Optical Physics (2011).

49 - R. O. Barrachina and J. Fiol: Classical Trajectory Monte Carlo Calculation of the Recoil-Ion Momentum Distribution for Positron-Impact Ionization Collisions, Journal of Physics B: Atomic, Molecular and Optical Physics 45, 065202 (2012).

50 - M. G. Bustamante, V. D. Rodríguez and R. O. Barrachina: Secondary peaks in the atomic ionization by a resonant laser pulse, Journal of Physics: Conference Series 397, 012014 (2012).

51 - R. O. Barrachina, J. Fiol and F. O. Navarrete: Positron-impact ionization studied by means of Recoil-Ion momentum distributions, Journal of Physics: Conference Series 388, 072019 (2012).

52 - R. O. Barrachina and J. Fiol: Labtalk (Research Highlights): A smoking gun evidence on the dynamics of the continuum electron-positron-proton three-body system, Journal of Physics B: Atomic, Molecular and Optical Physics (2012).

53 - E. Altszyler, R. O. Barrachina, J.-Y. Chesnel, F. Fremont: Multiple-Scattering Phase Distortion in the Ionization of Molecules, Journal of Physics: Conference Series 388, 102026 (2012).

54 - D. Fregenal, R. O. Barrachina, G. Bernardi, P. Focke, S. G. Suárez, J. Fiol: Orientation effects in collisions with protons and positrons, Journal of Physics: Conference Series 388, 082045 (2012).

55 - F. Navarrete, R. Della Picca, J. Fiol and R. O. Barrachina: Vortices in Ionization Collisions by Positron Impact, Journal of Physics B: Atomic, Molecular and Optical Physics 46, 115203 (2013).

56 - F. Navarrete and R. O. Barrachina: Vortices in the Three-Body Electron-Positron-Proton Continuum System induced by the Positron-Impact Ionization of Hydrogen, Journal of Physics B: Atomic, Molecular and Optical Physics 48, 055201 (2015).

57 - R. O. Barrachina, F. Colavecchia and R. D. Rivarola (editors): Physics of Highly Charged Ions (Proceedings of the 17th International Conference), Journal of Physics: Conference Series 583 (2015).

58 - F. Navarrete, M. Feole, R. O. Barrachina and Á. Kövér: When vortices and cusps meet, Journal of Physics: Conference Series 583, 012026 (2015).

59 - C. F. Clauser and R. O. Barrachina: Exact photoionization and radiative recombination cross section in a Coulomb potential, Journal of Physics: Conference Series 583, 012034 (2015).

60 - C. F. Clauser and R. O. Barrachina: Zero energy resonances in atomic processes within a plasma, Journal of Physics: Conference Series 583, 012037 (2015).

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Scattering Theory

Charge Exchange