Surface and bulk phonon-assisted resonances with surface bound states in the inelastic scattering of He atoms on NaCl (001)
- Department of Chemistry, The Florida State University, Tallahassee, FL (USA) Department of Physics, The Florida State University, Tallahassee, FL (USA) Center for Materials Research and Technology, The Florida State University, Tallahassee, FL (USA)
High-resolution He atom scattering experiments have been carried out on the NaCl (001) surface in both the {l angle}100{r angle} and {l angle}110{r angle} surface high symmetry directions. Time-of-flight (TOF) arrival spectra of the inelastically scattered He atoms were analyzed to obtain the surface phonon dispersion curves. Several of the TOF peaks corresponding to Rayleigh mode phonons were found to have relatively large intensities and there appeared to be a number of well-resolved peaks in the time-of-flight which did not correspond to surface-localized modes when the data were compared with previous calculations for NaCl. These data appear to be associated with surface and bulk phonon-assisted resonances with surface bound states. Analysis of these resonances yields results consistent with the {ital four} bound states of He on NaCl (001) which had been previously reported.
- DOE Contract Number:
- FG05-85ER45208
- OSTI ID:
- 5461815
- Journal Information:
- Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA), Journal Name: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA) Vol. 9:3; ISSN JVTAD; ISSN 0734-2101
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METAL COMPOUNDS
ATOM COLLISIONS
BOUND STATE
CHLORIDES
CHLORINE COMPOUNDS
COLLISIONS
CRYSTAL FACES
ELEMENTS
FLUIDS
GASES
HALIDES
HALOGEN COMPOUNDS
HELIUM
INELASTIC SCATTERING
NONMETALS
PHONONS
QUASI PARTICLES
RARE GASES
RAYLEIGH WAVES
SCATTERING
SEISMIC SURFACE WAVES
SEISMIC WAVES
SODIUM CHLORIDES
SODIUM COMPOUNDS
TIME-OF-FLIGHT METHOD