Angular correlation of electrons and positrons in internal pair conversion

Ch. Hofmann; J. Reinhardt; W. Greiner; P. Schlüter; G. Soff

doi:10.1103/PhysRevC.42.2632

Abstract

The angular distribution of electrons and positrons emitted in internal pair conversion is calculated. Coulomb-distorted waves are used as electron wave functions. Nuclear transitions of various multipolarities L>0 and of magnetic (ML) and of electric (EL) type are considered as well as E0 conversion. Analytical expressions for the angular correlation are derived, which are evaluated numerically assuming a finite extension of the nucleus and, for the EL and ML conversion, also in the point-nucleus approximation. The calculated angular correlations are compared with results obtained within the Born approximation and, for the E0 case, with experimental data.

Received 2 July 1990

DOI:https://doi.org/10.1103/PhysRevC.42.2632

Authors & Affiliations

Ch. Hofmann, J. Reinhardt, and W. Greiner

Institut für Theoretische Physik der J. W. Goethe Universität, Postfach 111 932, D-6000 Frankfurt am Main 11, Germany

P. Schlüter

Siemens Aktiengesellschaft, Zentralabteilung Forschung und Entwicklung, Postfach 830 953, D-8000 München 83, Germany

G. Soff

Gesellschaft für Schwerionenforschung, Planckstrasse 1, Postfach 110 552, D-6100 Darmstadt, Germany

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Physical Review C

covering nuclear physics