Volume 519, September 2010
|Number of page(s)||4|
|Section||Atomic, molecular, and nuclear data|
|Published online||07 September 2010|
Inelastic Na+H collision data for non-LTE applications in stellar atmospheres
Department of Physics and Astronomy, Uppsala University, Box 515, 75120 Uppsala, Sweden e-mail: Paul.Barklem@fysast.uu.se
2 Department of Theoretical Physics, Herzen University, St. Petersburg 191186, Russia
3 School of Chemistry, Newcastle University, NE1 7RU Newcastle upon Tyne, UK
4 Laboratoire de Chimie et Physique Quantique, UMR 5626 du CNRS, IRSAMC, Université Paul Sabatier, 118 rte de Narbonne, 31062 Toulouse, France
Accepted: 24 June 2010
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.
Key words: atomic data / line: formation / stars: abundances
© ESO, 2010
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