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Chinese Physics, 2000, Vol. 9(12): 892-899    DOI: 10.1088/1009-1963/9/12/003
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

ASYMMETRY PARAMETERS AND DIFFERENTIAL CROSS SECTIONS FOR PHOTOIONIZATION-EXCITATION OF HELIUM

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)
College of Physics and Information Engineering, Henan Normal University, Xinxiang 453002, China
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.
Keywords:  Asymmetry parameter      differential cross sections      photoionization      R-matrix  
Received:  07 April 2000      Accepted manuscript online: 
PACS:  32.80.Fb (Photoionization of atoms and ions)  
  34.50.-s (Scattering of atoms and molecules)  
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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