Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.3402v&link_type=abstract
American Astronomical Society, 186th AAS Meeting, #34.02; Bulletin of the American Astronomical Society, Vol. 27, p.859
Astronomy and Astrophysics
Astronomy
2
Scientific paper
We present a complete set of analytic fits to the photoionization cross sections from the ground states of atoms and all ions of elements H through Si, and S, Ar, Ca and Fe. Near the thresholds of ionization, the fits are based on the interpolated and smoothed over resonances Opacity Project theoretical photoionization cross sections. At higher energies, the fits reproduce calculated Hartree-Dirac-Slater photoionization cross sections.
Ferland Gary J.
Korista Kirk T.
Verner Dmitri A.
Yakovlev Dmitry G.
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