Elastic and inelastic atomic beam scattering from Ni(115)

Thesis/Dissertation · Mon Dec 31 23:00:00 EST 1984

OSTI ID:5227588

Aten, R M

Scattered angular intensities of the elastic diffraction of nearly monoenergetic helium beam from a Ni(115) crystalline surface in the (552) direction at a variety of incident energies and polar angles was measured. A method is developed of mapping the corrugation parameters from the hard-wall diffraction model, which fit the experimental data, to the corrugation parameters in the soft wall (Morse potential) model. The experimental data was fit by the soft wall model with only minor adjustments of the mapped corrugation parameters for well depth of 8.0 MeV and a steepness parameter of 2.2 reciprocal angstroms. The inelastic scattering of argon at an incident angle of 30/sup 0/ for a variety of incident energies and surface temperatures was measured both as a function of reflected angle and as a function of time for narrow incident pulse shapes at the angle corresponding to the backscattered rainbow maximum in the (552) direction, and at the specular angle in the (110) direction. The angular scans show the intensity is peaked at a backscattered rainbow angle in the (552) direction, and is peaked at the specular angle in the (110) direction. The time-of-flight measurements show that a linear relationship between the reflected energy and the incident energy and between the reflected energy and the surface temperature is obeyed.

• Research Organization: Washington Univ., Seattle (USA)
• OSTI ID: 5227588
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ARGON
ATOM COLLISIONS
ATOMIC BEAMS
BEAMS
COLLISIONS
CRYSTAL FACES
ELASTIC SCATTERING
ELEMENTS
FLUIDS
GASES
HELIUM
INELASTIC SCATTERING
METALS
NICKEL
NONMETALS
RARE GASES
SCATTERING
TRANSITION ELEMENTS