Convoy-electron emission in 20--100-keV grazing proton bombardment of Cu(100)

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.R1299· OSTI ID:7234254

Sanchez, E A; Martiarena, M L; Grizzi, O; Ponce, V H ^[1]

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1. Centro Atomico Bariloche, Comision Nacional de Energia Atomica, 8400 San Carlos de Bariloche, Rio Negro (Argentina)

We investigate the convoy-electron (CE) emission produced during grazing bombardment of a Cu(100) surface with 20--100-keV protons. At 0.5{degree} of incidence the CE peak measured at projectile energies below 50 keV along the direction of specular reflection of the ions presents the same width and shape as the CE peak corresponding to H{sup +}-He collisions and is considerably narrower than that observed in transmission through thin foils. This finding shows that CE's are mainly subjected to the Coulomb potential of the scattered ion when the velocity resolutions are high enough to localize electron states close to the ion velocity. A strong variation of the CE peak shape with the projectile incidence angle was also observed. This finding can be explained by a calculation that takes into account the angular distribution of the reflected ions.

• OSTI ID: 7234254
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:3; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

665300* -- Interactions Between Beams & Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
ANGULAR DISTRIBUTION
AUGER ELECTRON SPECTROSCOPY
BASIC INTERACTIONS
BEAMS
COLLISIONS
COPPER
COULOMB SCATTERING
DISTRIBUTION
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTRON EMISSION
ELECTRON SPECTROSCOPY
ELEMENTS
EMISSION
ENERGY RANGE
FOILS
INTERACTIONS
ION BEAMS
ION COLLISIONS
KEV RANGE
KEV RANGE 10-100
METALS
NUCLEON BEAMS
PARTICLE BEAMS
PROTON BEAMS
REFLECTION
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENTS
TRANSMISSION