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Guly
s, L.*; Fainstein, P. D.*; Shirai, Toshizo
Physical Review A, 65(5), p.052720_1 - 052720_9, 2002/05
Times Cited Count：16 Percentile：58.28(Optics)We perform an extension of the continuum-distorted-wave (CDW) approximation for single electron capture by introducing model potentials to describe the interaction of the active electron with the residual-target and projectile ions. The cross sections for electron transfer in collisions of bare and dressed projectile ions with H and He atoms are calculated and compared with experimental data and previous CDW calculations that make use of approximate analytical wave functions to represent the active electron initial and final states. For electron capture in proton-He collisions into definite final states the present calculations are in better agreement with experiments. We trace the differences in the results from both models to a different behavior at projectile scattering angles close to the Thomas peak.
Gulys, L.*; Fainstein, P. D.*; Shirai, Toshizo
Journal of Physics B; Atomic, Molecular and Optical Physics, 34(8), p.1473 - 1483, 2001/04
Times Cited Count：5 Percentile：31.39(Optics)The role of multiple scattering events has been investigated in single ionisation of atoms induced by energetic ion impact. The triply differential cross sections has been evaluated as a function of projectile scattering angle for fixed values of the emitted electron energy and angle within the frame of the Distorted Wave Born approximation (DWB). It has been shown that the double scattering mechanism, which (sometimes) results in a characteristic double scattering peak at definite projectile scattering angle, provides a satisfactory description of the process in a wide region of electron ejection energies and angles. For low energy electron emission the role of higher orders is not negligible, and the quantum mechanical nature of the process is more emphasized. At an electron velocity equal to the projectile velocity the analogy to the mechanism of electron capture into bound states has also been investigated. In this region the DWB theory for ionisation corresponds to the Oppenheimer-Brinkman-Kramers (OBK) model for electron capture.
ions and He atomsSuzuki, Shingo; Gulys, L.; Shimakura, Noriyuki*; Fainstein, P. D.*; Shirai, Toshizo
Journal of Physics B; Atomic, Molecular and Optical Physics, 33(17), p.3307 - 3318, 2000/00
Times Cited Count：8 Percentile：41.79(Optics)no abstracts in English
