Origin of the anomalous low-frequency losses observed in the inelastic scattering of He atoms from LiF(001)

Journal Article · Mon Jun 15 00:00:00 EDT 1981 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.23.6824· OSTI ID:6443593

Allison, W; Willis, R F; Cardillo, M

The anomalous-loss features below the Rayleigh surface-phonon dispersion curve, which have recently been reported by Brusdeylins et al. in their time-of-flight measurements of He atoms inelastically scattered from LiF(001), are shown to be a consequence of surface diffraction arising from a spread in particle velocities within the He beam. That is, the phenomenon is an extrinsic diffraction effect rather than an inelastic process associated with an intrinsic physical property of the crystal surface.

• Research Organization: Cavendish Laboratories, Cambridge CB3 0HE, United Kingdom
• OSTI ID: 6443593
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 23:12; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METAL COMPOUNDS
ATOM COLLISIONS
BEAMS
COHERENT SCATTERING
COLLISIONS
DIFFRACTION
ELEMENTS
ENERGY LOSSES
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HELIUM
HELIUM 4 BEAMS
INELASTIC SCATTERING
ION BEAMS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
LOSSES
NONMETALS
RARE GASES
SCATTERING
VELOCITY