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Observation of collective inner-shell effects for protons backscattered from the Al(110) surface

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Observation of collective inner-shell effects for protons backscattered from the Al(110) surface

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Título Observation of collective inner-shell effects for protons backscattered from the Al(110) surface
Autor Grande, Pedro Luis
Silva Junior, Agenor Hentz da
Schiwietz, Gregor
Starodub, D.
Garfunkel, E.
Gustafsson, T.
Abstract The surface peak of 98-keV protons backscattered from a clean Al (110) surface has been studied in detail for three different scattering geometries. The corresponding energy-loss distributions are asymmetric due to the single and double ionization of the Al inner-shell electrons (L shell). Effects beyond the independent-electron model (inner-shell collective effects) have been observed by using Monte Carlo simulations for the ion ballistic and coupled-channel calculations for the inelastic energy loss. These effects decrease the width by up to 10% for the full width at half maximum. Correspondingly, the low-energy tail of the surface peak is reduced in intensity by more than 30% in the case of a large number of near central collisions as in shadowing and blocking geometries.
Contido em Physical review. A, Atomic, molecular, and optical physics. New York. Vol. 72, no. 1 (July 2005), 012902 4p.
Assunto Alumínio
Impacto ion-superfície
Métodos de Monte Carlo
Perda de energia de particulas
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/104301
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