Excitation of Ca+by electron impact: polarization of line radiation and transitions between fine-structure levels
- 1 July 1970
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 3 (7) , 952-958
- https://doi.org/10.1088/0022-3700/3/7/009
Abstract
R matrices calculated by Burke and Moores (1968) for electron impact excitation of the 3d 2D and 4p 2P levels in Ca+ are used. Collision strengths for excitation of fine-structure levels are obtained at energies below and above the threshold for excitation of 4p 2P. These collision strengths are of interest in astrophysics. The polarization of radiation emitted from 2P is related to the cross sections for excitation of the 2P components. Calculated values for these cross sections and for the polarization of the 2P-2S multiplet are given for a range of excitation energies.Keywords
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