The calculation of high-energy photoionization cross sections for the Be isoelectronic sequence

被引:30
作者
Berrington, K [1 ]
Quigley, L
Zhang, HL
机构
[1] Queens Univ Belfast, Dept Appl Math & Theoret Phys, Belfast BT7 1NN, Antrim, North Ireland
[2] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
关键词
D O I
10.1088/0953-4075/30/23/009
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
R-matrix and distorted-wave calculations are carried out for photoionization for the Be-like ions Be I-Fe XXIII at high energies. Both methods include the inner-shell excitation process; in the R-matrix calculations these give rise to autoionizing resonances just below threshold for the onset of excitation from inner shells. Differences in the background cross section apparent for neutral Be become much less significant for the ionized species. The new calculations form a benchmarking exercise prior to upgrading the Opacity Project 'TOPBASE' database for high energies.
引用
收藏
页码:5409 / 5417
页数:9
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