物理学报
物理學報
물이학보
2000年
9期
892-899
,共8页
江玉海%孙金锋%朱遵略%杨沁玉%万陵德
江玉海%孫金鋒%硃遵略%楊沁玉%萬陵德
강옥해%손금봉%주준략%양심옥%만릉덕
Asymmetry parameter%differential cross sections%photoionization%R-matrix PACC: 3400
Asymmetry parameterβ2 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 θ=90°are provided at photon energies 69－76.8 eV employing the R-matrix method with a 20-term target representation, in which five polarization orbitals 6l are included. The asymmetry parameter β2 and the DCS, in the n=2 level in the region of 69－73eV, 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.
