SIMPLE APPROXIMATION FOR LOW-ENERGY TOTAL DETACHMENT CROSS-SECTIONS

被引:24
作者
GAUYACQ, JP
机构
[1] Lab. des Collisions Atomiques et Moleculaires, Univ. Paris-Sud, Orsay
关键词
D O I
10.1088/0022-3700/12/13/002
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The problem of electron detachment processes in low-energy H--He and H--Ar collisions is investigated within the zero-radius potential approximation of Demkov and Devdariani (1973), using ab initio data on the negative-ion molecular systems. It is shown that the strong-coupling region extends beyond the crossing point Rc of the neutral and ionic potential energy curves. Much information can be obtained from only the knowledge of the molecular quantities for R>Rc which can be obtained by standard molecular calculations. The scattering equations are solved in the sudden approximation allowing for a very simple approximation to the total cross sections; the results compare well with experimental data.
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页码:L387 / L393
页数:7
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