Inelasticity of the positron-surface interaction at low energies
- 1 June 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 27 (11), 6974-6977
- https://doi.org/10.1103/physrevb.27.6974
Abstract
Slow positron emission and reflection from clean single crystals of W and Cr are observed. The broad emitted-positron-energy distributions and the absence of reflections at incident energies below the bulk penetration threshold imply that strong inelastic processes operate in the surface region. These results contradict single-particle-potential models and demonstrate that many-body effects dominate positron-surface interactions.Keywords
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