ATOMIC DATA FOR ASTROPHYSICS .2. NEW ANALYTIC FITS FOR PHOTOIONIZATION CROSS-SECTIONS OF ATOMS AND IONS

Authors
VERNER DA FERLAND GJ KORISTA KT YAKOVLEV DG
Citation
Da. Verner et al., ATOMIC DATA FOR ASTROPHYSICS .2. NEW ANALYTIC FITS FOR PHOTOIONIZATION CROSS-SECTIONS OF ATOMS AND IONS, The Astrophysical journal, 465(1), 1996, pp. 487-498
Citations number
25
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astrophysical journal → ACNP
ISSN journal
0004637X
Volume
465
Issue
1
Year of publication
1996
Part
1
Pages
487 - 498
Database
ISI
SICI code
0004-637X(1996)465:1<487:ADFA.N>2.0.ZU;2-5
Abstract
We present a complete set of analytic Ms to the nonrelativistic photoi onization cross sections for the ground states of atoms and ions of el ements from H through Si, and S, Ar, Ca, and Fe. Near the ionization t hresholds, the fits are based on the Opacity Project theoretical cross sections interpolated and smoothed over resonances. At higher energie s, the fits reproduce calculated Hartree-Dirac-Slater photoionization cross sections.