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

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

2010-06-26

arxiv.org/abs/1006.5164v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 1 figure, A&A accepted

Scientific paper

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.

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