Auger deexcitation in a helium atom induced by a metal surface

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.53.4222· OSTI ID:284337

Alducin, M ^[1]

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1. Department of Applied Physics, Chalmers University of Technology and Goeteborg University, S-41296 Goeteborg (Sweden)

A theoretical model has been developed to study the direct Auger deexcitation process between two-electron states. The model is based on linear response theory. Therefore the excitations induced in the surface may be described with the surface response function. This model has been applied to calculate the Auger deexcitation rates when an excited He atom is moving parallel to an aluminum surface. More precisely, the distance and velocity dependence of the transition from the singlet states 2{sup 1}{ital S} and 2{sup 1}{ital P} to the ground state is presented. I finally compare these results with the ones obtained by using a one-electron description for the He atom. The differences between both models vanish when effective charges {ital Z}{sub {ital eff}}=1.69 a.u. and {ital Z}{sub {ital eff}}=1.57 a.u. are used for the 1{ital s} and the 2{ital p} states, respectively, in the one-electron model. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 284337
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALUMINIUM
ATOM COLLISIONS
AUGER EFFECT
EXCITATION
GROUND STATES
HELIUM
P STATES
S STATES