Calculation of the differential cross sections of excitation and ionization of a helium atom by electrons
Journal Article
·
· Russian Physics Journal
OSTI ID:99046
- V.V. Kuibyshev Tomsk State Univ. (Russian Federation)
Equations for the amplitudes and differential cross sections of electronic excitation and ionization of a helium atom are derived in the approximation of a {open_quotes}frozen{close_quotes} ion core. The wave functions of the discrete states are chosen in the form of generalized hydrogenlike orbitals. The radial wave functions of the continuous spectrum are determined by solving the equation of motion numerically. The differential excitation cross sections of excitation of the 2p, 3p, and 4p levels and ionization of a helium atom by electrons are calculated in the energy range up to 50 eV. Estimates are obtained for the nonorthogonal wave functions in the amplitudes of the excitation and ionization processes. It is shown that the given method is more compatible with experiment than the Born method.
- OSTI ID:
- 99046
- Journal Information:
- Russian Physics Journal, Journal Name: Russian Physics Journal Journal Issue: 12 Vol. 37; ISSN RPJOEB; ISSN 1064-8887
- Country of Publication:
- United States
- Language:
- English
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