Artículo
Elastic and inelastic processes in the scattering of positive ions of H and He from LiF
Fecha de publicación:
12/2001
Editorial:
APS Physics
Revista:
Physical Review B
ISSN:
0163-1829
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A theoretical calculation that allows for a fairly complete description of the charge-exchange and surface electronic excitation processes occurring in the H+ and He+ scattering by ionic surfaces is presented. The interaction parameters required to describe the collisional process are calculated by using a model Hamiltonian that has proved to provide a systematic good description of the properties like binding energy, equilibrium distance, and vibrational frequency of several dimers and atom-surface systems. The formalism is applied to the comparative study of the scattering of H+ and He+ by the fluorine atom of a LiF surface. The ion survival probabilities by elastic and inelastic processes are calculated, and the general trends of the experimental findings are reproduced. Very satisfactory results concerning the electron-hole pair excitations in the He+ scattering are obtained when the charge fluctuation on the active F site is considered. The role of the surface core states is found to be decisive for the e−h pair excitation by He+ scattering, and for the neutralization of H+ projectiles.
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Articulos(INTEC)
Articulos de INST.DE DES.TECNOL.PARA LA IND.QUIMICA (I)
Articulos de INST.DE DES.TECNOL.PARA LA IND.QUIMICA (I)
Citación
Torralba, M.C.; Slutzky, Claudia Marcela; García, Evelina Andrea; Goldberg, Edith Catalina; Elastic and inelastic processes in the scattering of positive ions of H and He from LiF; APS Physics; Physical Review B; 63; 12-2001; 195411/1-10
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