Positron-annihilation momentum profiles in aluminum: Core contribution and the independent-particle model

K. G. Lynn, J. R. MacDonald, R. A. Boie, L. C. Feldman, J. D. Gabbe, M. F. Robbins, E. Bonderup, J. Golovchenko

Research output: Contribution to journalArticle

222 Citations (Scopus)

Abstract

The momentum profiles from positron annihilation with core electrons in Al have been observed with a recently developed two-detector Doppler-broadening technique. Independent-particle-model (IPM) calculations are in good agreement with the experimental results beyond twice the Fermi momentum and suggest the absence of strong positron-electron correlation effects in this region. Comparisons of calculations with properly normalized momentum profiles indicate that high-momentum core contributions may provide information on the nature of vacancy-type defects and self-trapping effects.

Original languageEnglish
Pages (from-to)241-244
Number of pages4
JournalPhysical review letters
Volume38
Issue number5
DOIs
Publication statusPublished - Jan 1 1977

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Lynn, K. G., MacDonald, J. R., Boie, R. A., Feldman, L. C., Gabbe, J. D., Robbins, M. F., Bonderup, E., & Golovchenko, J. (1977). Positron-annihilation momentum profiles in aluminum: Core contribution and the independent-particle model. Physical review letters, 38(5), 241-244. https://doi.org/10.1103/PhysRevLett.38.241