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Title:
Inner shell excitation of lithium-like ions
Authors:
Goett, S. J.; Sampson, D. H.; Clark, R. E. H.
Affiliation:
AA(Pennsylvania State University, University Park, PA), AB(Pennsylvania State University, University Park, PA), AC(Los Alamos National Laboratory, Los Alamos, NM)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 54, Jan. 1984, p. 115-125. (ApJS Homepage)
Publication Date:
01/1984
Category:
Plasma Physics
Origin:
STI
NASA/STI Keywords:
Atomic Excitations, Cosmic Plasma, Electron Transitions, Ionic Collisions, Lithium, Coulomb Collisions, Electron Impact, Space Plasmas, Tables (Data)
DOI:
10.1086/190921
Bibliographic Code:
1984ApJS...54..115G

Abstract

Collision strengths have been calculated for all fine-structure inner shell excitation transitions from the levels of the 1s2 2p and 1s2 2s configurations to the levels of the 1s2l2l' configurations in the Li-like ions Si XII, Ca XVIII, Fe XXIV, Kr XXXIV, and Gd LXII. The approach used is a Coulomb-Born exchange method that can be regarded as an application of first-order time-dependent perturbation theory, with the entire electrostatic interaction between the electrons plus the relativistic corrections included in the perturbation. The differences between this method and the one used by Sampson, Clark, and Parks (1979) are discussed. The results are presented, including configuration mixing, parentage mixing, and intermediate coupling effects. The results are in very good agreement with others obtained using more elaborate methods.

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