Theoretical calculations of positron annihilation with rare-gas core electrons in simple and transition metals

S. Daniuk, M. Šob, and A. Rubaszek
Phys. Rev. B 43, 2580 – Published 1 February 1991
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Abstract

Positron-annihilation rates, momentum densities of positron-annihilation pairs, and electron-positron enhancement factors for rare-gas core electrons in 27 frequently investigated metals are calculated. The sensitivity of these quantities to various parameters of electron and positron models applied—namely, to the electron-electron exchange and correlation potential, electron configuration, lattice dimensions, and the shape of positron wave function, as well as the size of relativistic effects—is studied. The influence of inclusion of electron-positron correlations into both electron and positron wave functions on resulting annihilation characteristics is discussed. It is shown that the present approach reproduces fairly well also the total positron-annihilation rates and positron lifetimes.

  • Received 20 August 1990

DOI:https://doi.org/10.1103/PhysRevB.43.2580

©1991 American Physical Society

Authors & Affiliations

S. Daniuk

  • W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 937, PL-50-950 Wrocl/aw 2, Poland

M. Šob

  • Institute of Physical Metallurgy, Czechoslovak Academy of Sciences, Žižkova 22, CS-616 62 Brno, Czechoslovakia

A. Rubaszek

  • W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 937, PL-50-950 Wrocl/aw 2, Poland

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Vol. 43, Iss. 4 — 1 February 1991

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