Improved low-temperature rate constants for rotational excitation of CO by H_2

Simple item page
dc.creatorWernli, M.
dc.creatorValiron, P.
dc.creatorFaure, A.
dc.creatorWiesenfeld, L.
dc.creatorJankowski, P.
dc.creatorSzalewicz, K.
dc.date2006-01-18
dc.date.accessioned2026-07-07T11:25:12Z
dc.date.available2026-07-07T11:25:12Z
dc.descriptionCross sections for the rotational (de)excitation of CO by ground state para- and ortho-H_2 are obtained using quantum scattering calculations for collision energies between 1 and 520 cm^{-1}. A new CO-H_2 potential energy surface is employed and its quality is assessed by comparison with explicitly correlated CCSD(T)-R12 calculations. Rate constants for rotational levels of CO up to 5 and temperatures in the range 5-70 K are deduced. The new potential is found to have a strong influence on the resonance structure of the cross sections at very low collision energies. As a result, the present rates at 10 K differ by up to 50% with those obtained by \citet{flower01} on a previous, less accurate, potential energy surface.
dc.description8 pages, including 2 "online material" pages, 2 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0601384
dc.identifierhttp://arxiv.org/abs/astro-ph/0601384
dc.identifierAstron.Astrophys.446:367-372,2006
dc.identifierdoi:10.1051/0004-6361:20053919
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195435
dc.subjectAstrophysics
dc.titleImproved low-temperature rate constants for rotational excitation of CO by H_2
dc.typetext

Files

Collections

arXiv