Interaction of atoms with solid surfaces: Energy transfer in hyperthermal collisions of Li/sup +/ with W(110)

Journal Article · Sun Feb 01 04:00:00 EST 1981 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.441251· OSTI ID:6676720

Micha, D A

A recently developed many-body approach to atom--polyatomic collisions at hyperthermal energies is applied to scattering of light ions by metal surfaces. Following a brief description of the scattering model, which can in principle describe surface diffraction, surface rainbows, and phonon excitation, we concentrate on energy transfer processes. Cross sections are related to atom--pair correlation functions of the target surface, which are expressed in terms of the normal vibrational modes of a solid slab. The correlation functions are calculated within a short-time expansion which gives Gaussian distributions for energy transfer probabilities. A simple surface model of Einstein anisotropic oscillators is worked out in detail. Results of calculations for scattering of Li/sup +/ by W(110) at kinetic energies of several eV show good agreement with experimental values of most probable final energies and of distribution widths for several angles and initial ion energies.

• Research Organization: Departments of Chemistry and of Physics, University of Florida, Gainesville, Florida 32611
• OSTI ID: 6676720
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 74:3; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED PARTICLES
COLLISIONS
CORRELATION FUNCTIONS
CROSS SECTIONS
ELEMENTS
ENERGY RANGE
ENERGY TRANSFER
EV RANGE
EV RANGE 01-10
FUNCTIONS
ION COLLISIONS
IONS
LITHIUM IONS
METALS
PHONONS
QUASI PARTICLES
REFRACTORY METALS
TRANSITION ELEMENTS
TUNGSTEN