Asymmetry parameters and differential cross sections for photoionization-excitation of helium

被引:0
作者
Jiang, YH [1 ]
Sun, JF [1 ]
Zhu, ZL [1 ]
Yang, QY [1 ]
Wan, LD [1 ]
机构
[1] Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453002, Peoples R China
来源
CHINESE PHYSICS | 2000年 / 9卷 / 12期
关键词
asymmetry parameter; differential cross sections; photoionization; R-matrix;
D O I
暂无
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Asymmetry parameter beta (2) for photoionization of helium leaving the He+ ion in the n = 2 level and differential cross sections(DCSs) in the n = 2, 3, 4 levels with photon emission angle theta = 90 degrees are provided at photon energies 69 - 76.8eV employing the R-matrix method with a 20-term target representation, in which five polarization orbitals 6l are included. The asymmetry parameter beta (2) and the DCS, in the n = 2 level in the region of 69 - 73 eV, are in good agreement with available experimental and theoretical results. Above the n = 3 threshold, we present new theoretical results along with measurements. No theoretical and experimental results can be used to compare with the present calculations of the DCSs for photoionization into the He+ ion in the n = 3, 4 levels.
引用
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页码:892 / 899
页数:8
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