H2 dissociation due to collisions with He

L. Ohlinger, R. C. Forrey, Teck Ghee Lee, P. C. Stancil

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Cross sections for dissociation of H2 due to collision with He are calculated for highly excited rovibrational states using the quantum-mechanical coupled-states approximation. An L2 Sturmian basis set with multiple length scales is used to provide a discrete representation of the H2 continuum which includes orbiting resonances and a nonresonant background. Cross sections are given over a range of translational energies for both resonant and nonresonant dissociation together with the most important bound-state transitions for many different initial states. The results demonstrate that it is possible to compute converged quantum-mechanical cross sections using basis sets of modest size. It is found that collision-induced dissociation competes with inelastic scattering as a depopulation mechanism for the highly excited states. The relevance of the present calculations to astrophysical models is discussed.

Original languageEnglish (US)
Article number042712
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume76
Issue number4
DOIs
StatePublished - Oct 23 2007

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dissociation
collisions
cross sections
excitation
astrophysics
inelastic scattering
continuums
approximation
energy

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Ohlinger, L. ; Forrey, R. C. ; Lee, Teck Ghee ; Stancil, P. C. / H2 dissociation due to collisions with He. In: Physical Review A - Atomic, Molecular, and Optical Physics. 2007 ; Vol. 76, No. 4.
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H2 dissociation due to collisions with He. / Ohlinger, L.; Forrey, R. C.; Lee, Teck Ghee; Stancil, P. C.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 76, No. 4, 042712, 23.10.2007.

Research output: Contribution to journalArticle

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