LOW-ENERGY 4He+ SCATTERING FROM DEUTERIUM ADSORBED ON STEPPED Pd(331)

Autor:	W. P. Ellis, R. Bastasz
Rok vydání:	1997
Předmět:	Void (astronomy) Quasielastic scattering Scattering Chemistry Adsorption geometry Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Adsorption Low energy Octahedron Deuterium Materials Chemistry Atomic physics
Zdroj:	Surface Review and Letters. :1305-1308
ISSN:	1793-6667 0218-625X
DOI:	10.1142/s0218625x97001711
Popis:	We have taken angle-resolved data for the scattering of low-energy (4 He + from deuterium adsorbed on a stepped Pd (331) surface. The impact geometry was "up the staircase," i.e. the 4 He + beam was perpendicular to and directly incident onto the unshadowed Pd ledge atoms. A strong quasielastic scattering signal of 4 He + from D (4 He +/D) was observed at a forward-scattering angle of θ= 25° and an incidence angle of α= 76° from the (331) normal. The results agree with shadow-cone calculations of scattering first from Pd ledge atoms followed by a second event, 4 He +/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 previous 4 He + scattering study of the geometrically related Pd(110)-D(ads) system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2ce52a121ff02549664f96afca4f401c https://doi.org/10.1142/s0218625x97001711 Zobrazit plný text záznamu