Electron-impact excitation rate-coefficients and polarization of subsequent emission for Ar+ ion

Electron impact excitation in Ar+ ions has been studied by using fully relativistic distorted wave theory. Calculations are performed to obtain the excitation cross-sections and rate-coefficients for the transitions from the ground state 3p5 (J=3/2) to fine-structure levels of excited states 3p44s,...

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Bibliographic Details
Published in:Journal of quantitative spectroscopy & radiative transfer 2016-06, Vol.176, p.12-23
Main Authors: Dipti, Srivastava, Rajesh
Format: Article
Language:English
Subjects:
Electron-impact excitation
Polarization
Rate coefficients
Relativistic distorted wave theory
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Summary:Electron impact excitation in Ar+ ions has been studied by using fully relativistic distorted wave theory. Calculations are performed to obtain the excitation cross-sections and rate-coefficients for the transitions from the ground state 3p5 (J=3/2) to fine-structure levels of excited states 3p44s, 3p44p, 3p45s, 3p45p, 3p43d and 3p44d. Polarization of the radiation following the excitation has been calculated using the obtained magnetic sub-level cross-sections. Comparison of the present rate-coefficients is also done with the previously reported theoretical results for some unresolved fine structure transitions. •Fully relativistic distorted wave theory has been used to study the excitation of fine-structure states of Ar+.•We have calculated electron-impact excitation cross-sections for the wide range of incident electron energies.•Electron impact excitation rate-coefficients are calculated as a function of electron temperature.•Polarization of photons emitted following the decay of the excited fine-structure states are also reported.
ISSN:0022-4073
1879-1352
DOI:10.1016/j.jqsrt.2016.02.015