Bound-electron capture from surface atoms by heavy projectiles at grazing collisions

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

DOI:https://doi.org/10.1103/PhysRevA.50.2425· OSTI ID:6971778

Gravielle, M S; 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)

The capture of electrons bound to the atoms of a crystal surface by grazing heavy projectiles is studied in the high-energy regime. The eikonal impulse approximation is used to calculate the capture atomic probabilities, which are then folded with the distance-to-the-surface distribution given by planar channeling theory. Good agreement is found with experiments at high energies. We also study the influence of the rugosity or surface irregularities formed by adsorbed atoms. It is concluded that, in the high-energy tail, the capture of bound electrons is more important that capture from the free-electron gas. It is found that the closest distance to the surface and the rugosity play decisive roles.

• OSTI ID: 6971778
• 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
ADSORPTION
ATOM COLLISIONS
ATOMIC NUMBER
BOUND STATE
CAPTURE
CHANNELING
COLLISIONS
CRYSTALS
EIKONAL APPROXIMATION
ELECTRON CAPTURE
ELECTRON GAS
ENERGY DEPENDENCE
FLUIDS
GASES
IMPULSE APPROXIMATION
INCIDENCE ANGLE
POTENTIALS
PROBABILITY
PROJECTILES
SORPTION
SURFACE POTENTIAL