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

doi:10.1103/PhysRevLett.38.241

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

Rutgers University

Research output: Contribution to journal › Article › peer-review

227 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 language	English
Pages (from-to)	241-244
Number of pages	4
Journal	Physical review letters
Volume	38
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.38.241
Publication status	Published - 1977

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Positron-annihilation momentum profiles in aluminum: Core contribution and the independent-particle model",

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.",

author = "Lynn, {K. G.} and MacDonald, {J. R.} and Boie, {R. A.} and Feldman, {L. C.} and Gabbe, {J. D.} and Robbins, {M. F.} and E. Bonderup and J. Golovchenko",

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AU - Lynn, K. G.

AU - MacDonald, J. R.

AU - Boie, R. A.

AU - Feldman, L. C.

AU - Gabbe, J. D.

AU - Robbins, M. F.

AU - Bonderup, E.

AU - Golovchenko, J.

PY - 1977

Y1 - 1977

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AB - 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.

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