Effect of hydrogen adsorption on the charge exchange process in atom-surface collisions
1987; Elsevier BV; Volume: 182; Issue: 1-2 Linguagem: Inglês
10.1016/0039-6028(87)90099-9
ISSN1879-2758
AutoresJ. P. Gauyacq, J.J.C. Geerlings,
Tópico(s)Cold Atom Physics and Bose-Einstein Condensates
ResumoA model of the effect of the adsorption of hydrogen atoms on a charge exchange process in atom-surface collisions is presented. The adsorbed layer is represented by a 1D δ potential. The model is applied to the problem of H− formation in H+-CsW surface collisions. In the presence of the adsorbed layer, the charge exchange process becomes a three-body problem: the electrons can jump from the collisional H atom, to the metal and to the adsorbed H atoms. As a net effect, this results in a decrease of the charge exchange interaction. The model results are found to account for the recent observations of van Amersfoort et al. [J. Appl. Phys. 59 (1986) 241].
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