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Inelastic Na+H collision data for non-LTE applications in stellar atmospheres
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
2010 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 519, A20- p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2010. Vol. 519, A20- p.
Keyword [en]
atomic data, line: formation, stars: abundances
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-133750DOI: 10.1051/0004-6361/201015152ISI: 000283297300020OAI: oai:DiVA.org:uu-133750DiVA: diva2:370236
Available from: 2010-11-16 Created: 2010-11-15 Last updated: 2012-10-11Bibliographically approved

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Barklem, Paul
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