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K-shell Photoionization of Na-like to Cl-like Ions of Mg, Si, S, Ar, and CaWe present R-matrix calculations of photoabsorption and photoionization cross sections across the K edge of Mg, Si, S, Ar, and Ca ions with more than 10 electrons. The calculations include the effects of radiative and Auger damping by means of an optical potential. The wave functions are constructed from single-electron. orbital bases obtained using a Thomas-Fermi-Dirac statistical model potential. Configuration interaction is considered among all states up to n = 3. The damping processes affect the resonances converging to the K-thresholds causing them to display symmetric profiles of constant width that smear the otherwise sharp edge at the photoionization threshold. These data are important for the modeling of features found in photoionized plasmas.
Document ID
20120010626
Document Type
Reprint (Version printed in journal)
Authors
Witthoeft, M. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Garcia, J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kallman, T. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bautista, M. A.
(University of Western Michigan Kalamazoo, MI, United States)
Mendoza, C.
(Instituto Venezolano de Investigaciones Cientificas Caracas, Venezuela)
Palmeri, P.
(Mons Univ. Belgium)
Quinet, P.
(Mons Univ. Belgium)
Date Acquired
August 26, 2013
Publication Date
December 22, 2010
Publication Information
Publication: The Astrophysical Jouranl Supplement Series
Volume: 192
Subject Category
Astronomy
Report/Patent Number
GSFC.JA.00462.2012
Distribution Limits
Public
Copyright
Other
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