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M. Arifin
Department of Physics, Faculty of Mathematics and Natural Science Education, Indonesia University of Education Jl. Dr. Setiabudi No. 229 Bandung, West Java, Indonesia 40154
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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Triple differential cross-section formulation for two-electron photoionization of the helium metastable (1s2s) 1,3 S states M. Arifin
Indonesian Journal of Physics Vol 14 No 4 (2003): IJP Vol. 14 No. 4, October 2003
Publisher : Institut Teknologi Bandung

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Abstract

The triple differential cross-section (TDCS) for two-electron photoionization on the helium metastable (1s2s)1,3S states has been formulated. The momentum space formulation of the close-coupling theory was employed to describe nonperturbatively the inelastic scattering in the final state of the atom. To represent the electron-electron correlation in the initial states the multiconfiguration Hartree-Fock method was used. A Laguerre basis (L2) was chosen to expand the target spaces both in the discrete and continuum states. The TDCS as well as the single and double photoionization cross-sections were obtained directly by solving the Lippmann-Schwinger integral equations.
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