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Inelastic Na+H collision data for non-LTE applications in stellar atmospheres

Lookup NU author(s): Professor Alan Dickinson

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Abstract

Rate coefficients for inelastic Na+H collisions are calculated for all transitions between the ten levels up to and including the ionic state (ion-pair production), namely Na(3s,3p,4s,3d,4p,5s,4d,4f,5p)+H(1s) and Na++H-. The calculations are based on recent full quantum scattering cross-section calculations. The data are needed for non-LTE applications in cool astrophysical environments, especially cool stellar atmospheres, and are presented for a temperature range of 500-8000 K. From consideration of the sensitivity of the cross-sections to input quantum chemical data and the results of different methods for the scattering calculations, a measure of the possible uncertainties in the rate coefficients is estimated.

Publication metadata

Author(s): Barklem PS, Belyaev AK, Dickinson AS, Gadea FX

Publication type: Article

Publication status: Published

Journal: Astronomy & Astrophysics

Year: 2010

Volume: 519

Print publication date: 07/09/2010

ISSN (print): 0004-6361

ISSN (electronic): 1432-0746

Publisher: EDP Sciences

URL: http://dx.doi.org/10.1051/0004-6361/201015152

DOI: 10.1051/0004-6361/201015152

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