Atomic data for astrophysics. II. New analytic fits for photoionization cross sections of atoms and ions

D. A. Verner, G. J. Ferland, K. T. Korista, D. G. Yakovlev

Research output: Contribution to journalArticlepeer-review

1506 Scopus citations

Abstract

We present a complete set of analytic fits to the nonrelativistic photoionization cross sections for the ground states of atoms and ions of elements from H through Si, and S, Ar, Ca, and Fe. Near the ionization thresholds, the fits are based on the Opacity Project theoretical cross sections interpolated and smoothed over resonances. At higher energies, the fits reproduce calculated Hartree-Dirac-Slater photoionization cross sections.

Original languageEnglish
Pages (from-to)487-498
Number of pages12
JournalAstrophysical Journal
Volume465
Issue number1 PART I
DOIs
StatePublished - 1996

Keywords

  • Atomic data
  • Atomic processes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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