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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.
Document Type
Article
Publication Date
7-1-1996
Digital Object Identifier (DOI)
http://dx.doi.org/10.1086/177435
Repository Citation
Verner, D. A.; Ferland, Gary J.; Korista, K. T.; and Yakovlev, D. G., "Atomic Data for Astrophysics. II. New Analytic FITS for Photoionization Cross Sections of Atoms and Ions" (1996). Physics and Astronomy Faculty Publications. 153.
https://uknowledge.uky.edu/physastron_facpub/153
Notes/Citation Information
Published in The Astrophysical Journal, v. 465, no. 1, p. 487-498.
© 1996. The American Astronomical Society. All rights reserved.
The copyright holder has granted permission for posting the article here.