LOW-ENERGY4He+SCATTERING FROM DEUTERIUM ADSORBED ON STEPPEDPd(331)

W. P. Ellis and R. Bastasz
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W. P. Ellis: Los Alamos National Laboratory, CST-1, MS J565, Los Alamos, NM 87545, USA
R. Bastasz: Sandia National Laboratories, Org 8716, Livermore, CA 94551, USA

Surface Review and Letters (SRL), 1997, vol. 04, issue 06, 1305-1308

Abstract: We have taken angle-resolved data for the scattering of low-energy ( Pd ledge atoms. A strong quasielastic scattering signal of4He+from D (4He+/D) was observed at a forward-scattering angle ofθ= 25°and an incidence angle ofα= 76°from the (331) normal. The results agree with shadow-cone calculations of scattering first from Pd ledge atoms followed by a second event,4He+/D. The resultant adsorption geometry shows D to reside in the quasi-threefold ledge site on the surface directly above the bulk fcc octahedral void. These results are consistent with the previous4He+scattering study of the geometrically related Pd(110)-D(ads) system.

Date: 1997
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DOI: 10.1142/S0218625X97001711

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