Convergence study of He 2+ +H and He + +H + charge exchange cross sections using a molecular approach with an optimised common translation factor
1987; IOP Publishing; Volume: 20; Issue: 22 Linguagem: Inglês
10.1088/0022-3700/20/22/019
ISSN1747-3721
AutoresL. F. Errea, J. M. Gómez-Llorente, L. Méndez, Antoni Riéra,
Tópico(s)Photochemistry and Electron Transfer Studies
ResumoA convergence study of cross sections is reported for electron transfer in He2++H and He++H+ collisions, using a molecular approach with up to ten (1 s sigma , 2 p sigma , 2 s sigma , 2 p pi ; 3 d sigma , 3 d pi , 3 p sigma , 4 f sigma , 4 f pi , 5 g sigma ) basis functions and a common translation factor (CTF) which was optimised according to the norm criterion. The energy ranges investigated are 0.75-16 keV amu-1 (He2++H) and 5-80 keV amu-1 (He++H+). Conclusions are drawn from the excellent agreement between these results and those of considerably more involved calculations with plane-wave translation factors, and the persisting small discrepancy between theoretical and measured sigma (2sHe+) cross sections is discussed.
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