Ar L Auger-electron emission in 0. 4-, 0. 8-, and 1. 6-MeV Ar sup + -Kr and Kr sup + -Ar collisions

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.667· OSTI ID:6506570

Zarcone, M J; Kessel, Q C ^[1]

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1. Department of Physics, University of Connecticut, Storrs, CT (USA) The Institute of Materials Science, University of Connecticut, Storrs, CT (USA)

The electron-energy spectra for electrons emitted from Ar{sup +}-Kr and Kr{sup +}-Ar collisions have been measured for projectile energies of 0.4, 0.8, and 1.6 MeV. The spectra show a peak, or peaks, attributable to {ital L}-vacancy production in the AR ions superimposed on a continuous portion of the electron spectra. This continuous portion, which decreases with increasing electron energy, extends to electron energies in the 600--800-eV range. The data show some events for which electrons with more than twice the normal {ital L}{sub 2,3}-{ital MM} Auger energies are emitted, and their origin is not clear. They might be due to the decay of {ital L}{sub 1} vacancies or to the filling of a vacancy in a molecular orbital during the collision. An Auger process in which two 2{ital p} vacancies are filled with the subsequent emission of only one electron, an {ital L}{sub 2,3}{ital L}{sub 2,3-}{ital MMM} transition, might contribute to the spectra above 400 eV. The association of the major peak with Ar {ital L}-vacancy production is in contrast to a recent paper in which the peak, together with the higher energy electrons, was attributed to quasimolecular electron emission, specifically, filling of 4{ital s}{sigma} and 4{ital p}{pi} molecular-orbital vacancies during the collision.

• OSTI ID: 6506570
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 42:1; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ARGON IONS
ATOM COLLISIONS
AUGER EFFECT
CHARGED PARTICLES
COLLISIONS
DATA
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 100-1000
KRYPTON
KRYPTON IONS
MEV RANGE
MEV RANGE 01-10
NONMETALS
NUMERICAL DATA
RARE GASES