Quantum calculation of inelastic co collisions with H. I. Rotational quenching of low-lying rotational levels

Benhui Yang, P. C. Stancil, N. Balakrishnan, R. C. Forrey, J. M. Bowman

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

New quantum scattering calculations for rotational deexcitation transitions of CO induced by H collisions using two CO-H potential energy surfaces (PESs) from Shepler et al. are reported. State-to-state rate coefficients are computed for temperatures ranging from 1 to 3000 K for CO(v = 0, j) deexcitation from j = 1 to 5 to all lower j′ levels, with j being the rotational quantum number. Different resonance structures in the cross sections are attributed to the differences in the anisotropy and the long-range van der Waals well depths of the two PESs. These differences affect rate coefficients at low temperatures and give an indication of the uncertainty of the results. Significant discrepancies are found between the current rate coefficients and previous results computed using earlier potentials, while the current results satisfy expected propensity rules. Astrophysical applications to modeling far infrared and submillimeter observations are briefly discussed.

Original languageEnglish (US)
Article number49
JournalAstrophysical Journal
Volume771
Issue number1
DOIs
StatePublished - Jul 1 2013

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collision
quenching
potential energy
collisions
coefficients
quantum numbers
astrophysics
indication
anisotropy
cross section
scattering
well
cross sections
modeling
calculation
rate
temperature

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Yang, Benhui ; Stancil, P. C. ; Balakrishnan, N. ; Forrey, R. C. ; Bowman, J. M. / Quantum calculation of inelastic co collisions with H. I. Rotational quenching of low-lying rotational levels. In: Astrophysical Journal. 2013 ; Vol. 771, No. 1.
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Quantum calculation of inelastic co collisions with H. I. Rotational quenching of low-lying rotational levels. / Yang, Benhui; Stancil, P. C.; Balakrishnan, N.; Forrey, R. C.; Bowman, J. M.

In: Astrophysical Journal, Vol. 771, No. 1, 49, 01.07.2013.

Research output: Contribution to journalArticle

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AU - Yang, Benhui

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AU - Bowman, J. M.

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