Antiproton-impact ionization of H2

被引:13
作者
Pindzola, M. S. [1 ]
Lee, Teck-Ghee [1 ]
Colgan, J. [2 ]
机构
[1] Auburn Univ, Dept Phys, Auburn, AL 36849 USA
[2] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM USA
基金
美国国家科学基金会;
关键词
HYDROGEN MOLECULES; SINGLE IONIZATION; HELIUM;
D O I
10.1088/0953-4075/43/23/235201
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Ionization processes in antiproton collisions with H-2 are studied by direct solution of the time-dependent Schrodinger equation. A time-dependent close-coupling method based on an expansion of a one-electron 3D wavefunction in the field of H-2(+) is used to calculate single-ionization cross sections at incident energies ranging from 50 keV to 1.5 MeV. Averaging over the molecular orientations, the single-ionization cross sections are in reasonable agreement with time-dependent basis set calculations and experiment. A time-dependent close-coupling method based on an expansion of a two-electron 6D wavefunction in the field of H-2(2+) is used to calculate single-and double-ionization cross sections at an incident energy of 100 keV. Initiatory 6D results for the H-2(+) production cross section range are somewhat lower than experiment, while the H+ production cross section range brackets experiment.
引用
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页数:6
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