EAS Publications Series
Volume 17, 2005Element Stratification in Stars: 40 Years of Atomic Diffusion
|Page(s)||61 - 66|
|Published online||13 January 2006|
G. Alecian, O. Richard and S. Vauclair (eds)
EAS Publications Series, 17 (2005) 61-66
Radiative accelerations through photoionization and bremsstrahlung; autoionization
École Normale Supérieure de Lyon,
CRAL (UMR CNRS No. 5574),
69364 Lyon Cedex 07, France
Whereas transition probabilities needed for the computation of radiative forces due to bound-bound absorptions are generally available photoionisation and bremsstrahlung require going one step further than the dipolar approximation in treating the radiation matter interaction. I will try to give an overview of the current status on both theoretical and practical points. Autoionization resonances deserve further investigation: though they can dominate photoionization cross sections very little is known on how they might impact radiative forces. I will show through recent literature that specific atomic calculations have to be performed.
© EAS, EDP Sciences, 2005
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