K-shell photoionization cross sections - Calculations and simple fitting formulae

Details K-shell photoionization cross sections - Calculations and simple fitting formulae K-shell photoionization cross sections - Calculations and simple fitting formulae

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237..267b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 1, Oct. 1990, p. 267-269.

Astronomy and Astrophysics

Astrophysics

25

Hartree-Fock-Slater Method, Ionization Cross Sections, Photoionization, Atomic Energy Levels, Beryllium, Helium Atoms, Lithium

Scientific paper

Simple analytic formulas are proposed to fit the theoretical Hartree-Dirac-Slater K-shell photoionization cross sections of atoms and ions with atomic number of 26 or higher. It is shown that the criterion of Kamrukov et al. (1983) permits the description of many cross sections for a variety of atoms and ions. Fitting parameters are shown for the photoionization cross sections of He, Li, and Be atoms and ions with a given number of electrons.

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