ELECTRON-IMPACT IONIZATION OF AR-7+

被引:8
|
作者
TAYAL, SS [1 ]
机构
[1] CLARK ATLANTA UNIV, CTR THEORET STUDIES PHYS SYST, ATLANTA, GA 30314 USA
来源
PHYSICAL REVIEW A | 1994年 / 49卷 / 04期
关键词
D O I
10.1103/PhysRevA.49.2561
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Cross sections for the ionization of Ar7+ by electron impact have been calculated using the R-matrix method in two independent 19- and 45-state close-coupling approximations. Autoionization states arising from the 2s(2)2p(5)3s3l configurations together with the ground and excited 2s(2)2p(6)3l states are included in the close-coupling expansion in the 19-state calculation, while additional autoionization states arising from the 2s(2)2p(5)3s4l (l = 0,1,2) and 2s2p(6)3s3l configurations and the low-lying bound states 2s(2)2p(6)4l are also included in the 45-state calculation. Several Rydberg series of resonances converging to various autoionizing states are formed due to the resonant-excitation-double-autoionization process and these are found to significantly enhance the cross sections in the autoionizing threshold region. The calculated results are compared with the recent crossed-beam measurements.
引用
收藏
页码:2561 / 2566
页数:6
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