Interactions of molecules with surfaces. Progress report, 1 February 1982-31 January 1983

Technical Report · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6761544

Greene, E F

The first measurements of the angular distribution of He and Ar atoms scattered from the surfaces of LiF and graphite cyrstals have been obtained. Narrower velocity distributions for the beams incident on the crystal would be desirable and are expected from modifications now being made. The yield of ions formed when beams of Cs, K, Na, and Li atoms hit silicon(100) and (111) surfaces are used to follow the kinetics of desorption of the atoms and to deduce information about how they move across the surfaces and diffuse into the bulk of the crystal. In addition study of the desorption reveals phase transitions in the surface and information about its structure. The decomposition of tetramethyldioxetane can be activated by collision of an energetic molecule with a surface. The reaction is followed by detecting the light emitted from one of the products, an excited molecule of acetone. The intensity of the light varies markedlly with the nature of the surface and the kinetic energy of the incoming molecule. A simple, equilibrium model helps to clarify the nature of the compensation effect in the kinetics of heterogeneous reactions.

• Research Organization: Brown Univ., Providence, RI (USA)
• DOE Contract Number: AC02-78ER04974
• OSTI ID: 6761544
• Report Number(s): DOE/ER/04974-5; COO-4974-5; ON: DE83006820
• 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
ALKALI METALS
ANGULAR DISTRIBUTION
ARGON
ATOM COLLISIONS
CARBON
CESIUM
CHEMICAL REACTIONS
COLLISIONS
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALS
DATA
DECOMPOSITION
DISTRIBUTION
ELEMENTAL MINERALS
ELEMENTS
EMISSION
EXPERIMENTAL DATA
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
GRAPHITE
HALIDES
HALOGEN COMPOUNDS
HELIUM
INFORMATION
LITHIUM
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
METALS
MINERALS
MOLECULE COLLISIONS
MONOCRYSTALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHASE TRANSFORMATIONS
PHOTON EMISSION
POTASSIUM
RARE GASES
SCATTERING
SEMIMETALS
SILICON
SODIUM