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Inelastic focusing effects in atom-surface scattering

AuthorsGlebov, A.; Manson, J:R.; Miret-Artés, Salvador ; Skofronick, J.G.; Toennies, J.P.
Issue Date1998
PublisherAmerican Physical Society
CitationPhysical Review B 57: R9455- R9458 (1998)
AbstractAn inelastic focusing mechanism has been identified in the angular distributions of helium atoms scattered from single-crystal NaCl(001) surfaces as being due to energy exchange with a Rayleigh phonon mode. This effect, called inelastic focusing, occurs under special conditions in which the small spread of energies in the incident beam is sharply focused into a very narrow range of final angles. For a fixed initial scattering angle this is mathematically described as a singularity associated with the density of states in the incident momentum as a function of final scattering angle. This effect is an intrinsic feature of any scattering event of particles from surfaces and could be used to greatly enhance the intensity of weak single-phonon features in inelastic time-of-flight spectra.© 1998 The American Physical Society
Identifiersdoi: 10.1103/PhysRevB.57.R9455
issn: 0163-1829
Appears in Collections:(CFMAC-IFF) Artículos
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