Electron impact excitation of helium in Debye plasma
The probability, differential, and integral scattering cross sections of the 11S ! 21S and 11S !
21P transitions of helium have been calculated in the first Born approximation. The projectiletarget
interactions depending on the temperature and the density of plasma are described by the
Debye-H€uckel model. Wave functions of the target before and after collision were modeled by non
orthogonal Hartree-Fock orbitals. The wave functions parameters are calculated with the Ritz variational
method. We improve our unscreened first Born approximation integral cross sections by
using the BE-scaled (B stands for binding energy and E excitation energy) method. The second
Born approximation has also been used to calculate the excitation cross sections in Debye plasma.
Our calculations are compared to other theoretical and experimental results where applicable.
Auteur(s) : S. Diallo, L. Gomis, I. G. Faye, M. S. Tall, I. Diédhiou, C. S. Diatta, and M. Zammit
Pages : 033517
Année de publication : 2015
Revue : PHYSICS OF PLASMAS
N° de volume : 22
Type : Article
Statut Editorial : publié en ligne
Mise en ligne par : GOMIS Louis