ELECTRON-CAPTURE FROM LITHIUM AND ITS IONS BY HIGH-ENERGY PROTONS

被引:23
作者
BANYARD, KE
SHIRTCLIFFE, GW
机构
[1] Department of Physics, University of Leicester, Leicester
关键词
D O I
10.1088/0022-3700/12/19/010
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The continuum-distorted wave method is used to calculate cross sections for electron capture by fast protons from the lithium atom and its related positive ions. With the exception of Li2+(12S), each target electronic state is described by a Hartree-Fock wavefunction. For the lithium atom, capture can occur from either the K or L shell and the resulting ion can exist either in its ground state 11S or in one of the excited states 21S or 23S; cross sections are tabulated for each of these states for capture into the hydrogen levels (nl). Results for the individual capture states (nl) are also reported for the Li+ target. Total capture cross sections are calculated for each target by means of the Oppenheimer n-3 rule. For Li and Li+, total cross sections are also evaluated at E<200 keV. A procedure for determining the effective screening of the target nucleus by the uncaptured electrons is discussed and the sensitivity of the cross sections with respect to such screening is examined.
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页码:3247 / 3256
页数:10
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