Abstract Asymmetry parameter β2 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=900 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 \bar{6}l are included. The asymmetry parameter β2 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.
Received: 07 April 2000
Accepted manuscript online:
Fund: Project supported by the Natural Science and Theoretical Education Foundation of Henan Province, China (1999140009).
Cite this article:
Jiang Yu-hai (江玉海), Sun Jin-feng (孙金锋), Zhu Zun-lue (朱遵略), Yang Qin-yu (杨沁玉), Wan Ling-de (万陵德) ASYMMETRY PARAMETERS AND DIFFERENTIAL CROSS SECTIONS FOR PHOTOIONIZATION-EXCITATION OF HELIUM 2000 Chinese Physics 9 892
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