Authors

H. P. Saha

Comments

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Abbreviated Journal Title

Phys. Rev. A

Keywords

DIFFERENTIAL CROSS-SECTIONS; PHOTO-DOUBLE-IONIZATION; HELIUM; DOUBLE-PHOTOIONIZATION; EV ABOVE-THRESHOLD; ANGULAR-DISTRIBUTIONS; ASYMMETRY PARAMETER; EXCESS ENERGY; GAMMA; HE; Optics; Physics, Atomic, Molecular & Chemical

Abstract

Very recently we were successful in extending the multiconfiguration Hartree-Fock (MCHF) method for electron-impact ionization of atoms to allow double photoionization of atoms. We report, as a test case, the results of our calculation of the triple differential cross section (TDCS) for double photoionization of helium. We have calculated the initial state in the Hartree-Fock and the MCHF approximations and the final state in the Coulomb approximation and the screening potential approximation in order to compare with previously published works. We compare the present results calculated at 30-eV excess photon energy shared equally by two final-state continuum electrons, with other similar theoretical calculations. Finally, we also calculate the TDCS at 20-eV excess photon energy to compare with experimental observation.

Journal Title

Physical Review A

Volume

87

Issue/Number

4

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

7

WOS Identifier

WOS:000317584800006

ISSN

1050-2947

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