Elsevier

Physica B+C

Volume 144, Issue 2, January 1987, Pages 237-246
Physica B+C

Positron and delta electron emission in the systems Ta + Th and Au + U

https://doi.org/10.1016/0378-4363(87)90039-8Get rights and content

Abstract

We present theoretical positron- and δ-electron spectra for the sub-critical systems Ta + Th (Ztot = 163) and U + Au (Ztot = 171) as a function of impact parameter b and laboratory angle θL. For the system Ta + Th in addition the excitation function for dynamical positron emission in the vicinity of the Coulomb barrier was evaluated. Assuming the formation of long-lived giant nuclei, we determine the kinetic energy Te+ at which spontaneous positron emission occurs as a function of Ztot. For constant values of Te+ we evaluated the corresponding nuclear densities in dependence on the total nuclear charge.

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