Journal Article

Calculation of rate constants for vibrational and rotational excitation of the H<sup>+</sup><sub>3</sub> ion by electron impact

Viatcheslav Kokoouline, Alexandre Faure, Jonathan Tennyson and Chris H. Greene

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 405, issue 2, pages 1195-1202
Published in print June 2010 | ISSN: 0035-8711
Published online June 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.16522.x
Calculation of rate constants for vibrational and rotational excitation of the H+3 ion by electron impact

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We present theoretical thermally averaged rate constants for vibrational and rotational (de-)excitation of the H+3 ion by electron impact. The constants are calculated using the multichannel quantum-defect approach. The calculation includes processes that involve a change |ΔJ| ≤ 2 in the rotational angular momentum J of H+3. The rate constants are calculated for states with J≤ 5 for rotational transitions of the H+3 ground vibrational level. The thermal rates for transitions among the lowest eight vibrational levels are also presented, averaged over the rotational structure of the vibrational levels. The conditions for producing non-thermal rotational and vibrational distributions of H+3 in astrophysical environments are discussed.

Keywords: molecular data; molecular processes; plasmas; ISM: molecules

Journal Article.  5122 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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