INVESTIGADORES
ROMERO Marcelo Ariel
artículos
Título:
Electron capture and loss in the scattering of H+ from HOPG graphite
Autor/es:
R.A. VIDAL; F. BONETTO; J. FERRÓN; M.A. ROMERO; EVELINA A. GARCÍA; E.C. GOLDBERG
Revista:
SURFACE SCIENCE
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2011 vol. 605 p. 18 - 23
ISSN:
0039-6028
Resumen:
In this paper we report measurements of the positive (H+) and negative (H-) ion fractions after H+ scatteringfrom a highly oriented pyrolytic graphite (HOPG) surface. The experimental results show that for a fixed (large) exit angle the negative fraction is almost independent of the primary ion energy, while the positivefraction increases steadily. For a fixed incident energy, the H+ and H- fractions show a complementary behavior with exit angle. A dynamical quantum mechanical calculation, based on the localized and extendedfeatures of the atomsurface interaction, allows us to understand many of the features of the experimental results.
