Quantum formalism for electron capture from a solid surface by heavy projectiles making grazing collisions

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.2410· OSTI ID:7196937

Miraglia, J E ^[1]

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1. Instituto de Astronomia y Fisica del Espacio, Consejo Nacional de Investigaciones Cientificas y Tecnicas, Casilla de Correo 67, Sucursal 28, 1428 Buenos Aires (Argentina)

Electron capture from surfaces by grazing heavy projectiles is studied with a fully quantum treatment. The collision is considered in the high-energy regime where the projectile velocity is larger than the Fermi velocity of the free-electron gas of the solid. Some approximations commonly used in atomic collision theory, such as the first-order Born, the impulse, and the Vainstein-Presnyakov-Sovelman approximations, are adapted to the present geometry and interactions. The surface-electron and surface-projectile interactions are represented according to the jellium model and the Moliere and Lindhard potentials. Detailed calculations are made for protons on an Al(111) surface and compared with recent experiments. No agreement is found; the theory largely underestimates the experiments at high energies. This disagreement shows that the high-energy-tail data cannot be explained as a capture process from the free-electron gas. Other neutralization mechanisms should take place to account for the experiments.

• OSTI ID: 7196937
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:3; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

665300* -- Interactions Between Beams & Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
BARYONS
BEAM NEUTRALIZATION
CAPTURE
COLLISIONS
COMPARATIVE EVALUATIONS
CRYSTAL FACES
DATA
ELECTRON CAPTURE
ELECTRON GAS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EVALUATION
EXPERIMENTAL DATA
FERMIONS
FLUIDS
GASES
HADRONS
INCIDENCE ANGLE
INFORMATION
ION COLLISIONS
MECHANICS
METALS
MEV RANGE
NUCLEONS
NUMERICAL DATA
PROTONS
QUANTUM MECHANICS
SURFACES