ELECTRON REMOVAL FROM ATOMIC-HYDROGEN BY COLLISIONS WITH FULLY STRIPPED OXYGEN IONS

被引:27
作者
SALOP, A
OLSON, RE
机构
[1] Molecular Physics Laboratory, SRI International, Menlo Park
来源
PHYSICAL REVIEW A | 1979年 / 19卷 / 05期
关键词
D O I
10.1103/PhysRevA.19.1921
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Cross sections for charge transfer and impact ionization in O8+ + H collisions have been calculated in the range of collision velocities (0.1-10) × 108 cm/sec. At the lower velocities, up to 1.2 × 108 cm/sec, charge-transfer cross sections were determined by means of the perturbed-stationary-state method in the impact-parameter approximation with a selective basis set of adiabatic one-electron two-center orbitals. The charge-transfer cross section increases monotonically in this region, attaining a value of 8 × 10-15 cm2 at 1.2 × 108 cm/sec. Rotational coupling was found to be an important mechanism which contributes significantly to the large cross sections in the molecular regime. Thus the present results are at least a factor of 2 larger than previous Landau-Zener calculations. Above 2.2 × 108 cm/sec, a classical-trajectory Monte Carlo approach was used to compute both charge-transfer and ionization cross sections. At velocities above 5 × 108 cm/sec, ionization becomes the dominant electron-removal process. © 1979 The American Physical Society.
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页码:1921 / 1929
页数:9
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