Electronic interactions of directed photon beams with surfaces. Final report, 1 Jun 88-31 Aug 90

Technical Report · Wed Sep 25 04:00:00 EDT 1991

OSTI ID:5972893

Barnes, A V; Mendenhall, M; Tolk, N H

The object of this research program is to investigate the fundamental dynamics of energy-surface interactions, with emphasis on the ways in which the energy deposited by incident UV photons and electrons lead to surface bond-breaking phenomena, to fluorescence, and to modification of surfaces and near-surface layers of bulk materials. Optical radiation may arise from electronic excitations in the near surface bulk or from excited atoms and molecules emitted from the surface. The authors studies of electronically-induced desorption have shown that a significant fraction of the incident energy may be channeled into bond-breaking and desorption processes leading to ejection of excited neutral atoms and molecules from metal oxide and insulator surfaces which subsequently decay to produce optical radiation in the visible, UV or IR. Here, they report on (a) photo-stimulated desorption of excited alkali atoms following irradiation of alkali halide crystals with ultraviolet light and on (b) optical fluorescence arising from surfaces using an electron beam at room- and at cryo-temperatures under different gas dosing environments.

• Research Organization: Vanderbilt Univ., Nashville, TN (United States). Center for Atomic and Molecular Physics at Surfaces
• OSTI ID: 5972893
• Report Number(s): AD-A-241878/8/XAB; CNN: F49620-88-C-0080
• Country of Publication: United States
• Language: English

Related Subjects

665300* -- Interactions Between Beams & Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ATOMS
BEAMS
BERYLLIUM
BERYLLIUM COMPOUNDS
BERYLLIUM OXIDES
BOSONS
CHALCOGENIDES
COLLISIONS
CRYSTALS
DESORPTION
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY DEPOSITION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
FLUORESCENCE
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INTERACTIONS
LAYERS
LEPTON BEAMS
LEPTONS
LUMINESCENCE
MAGNESIUM COMPOUNDS
MAGNESIUM FLUORIDES
MASSLESS PARTICLES
METALS
MOLECULES
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
PHOTON BEAMS
PHOTON COLLISIONS
PHOTONS
PHYSICAL PROPERTIES
RADIATIONS
RESEARCH PROGRAMS
SURFACES
ULTRAVIOLET RADIATION