Quantum mechanical calculations of rotational transitions in H-H2 collisions

Robert C. Forrey, N. Balakrishnan, Alex Dalgarno, Stephen Lepp

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

We report quantum mechanical cross sections and rate coefficients for rotational transitions due to collisions of hydrogen atoms with hydrogen molecules. The sensitivity of the results to the nature of the potential energy surface and to the scattering formulation is investigated. We find that the rigid rotor and harmonic oscillator approximations are inadequate to describe the dynamics. We make use of the most reliable of the potential energy surfaces in a close-coupled description of the nonreactive scattering that takes the vibrational motion into account, and we calculate rate coefficients for rotational transitions at temperatures below 1000 K, where the reactive channels may be neglected.

Original languageEnglish (US)
Pages (from-to)1000-1003
Number of pages4
JournalAstrophysical Journal
Volume489
Issue number2 PART I
DOIs
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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