Eur. Phys. J. A (2018) 54: 65
https://doi.org/10.1140/epja/i2018-12495-4

Regular Article - Theoretical Physics

A calculation model to half-life estimate of two-proton radioactive decay process

Centro Brasileiro de Pesquisas Fısicas - CBPF/MCTIC, Rua Dr. Xavier Sigaud 150, 22290-180, Rio de Janeiro, RJ, Brazil

^* e-mail: emil@cbpf.br

Received: 20 December 2017
Accepted: 15 March 2018
Published online: 25 April 2018

Abstract

Partial half-life of the radioactive decay by the two-proton emission mode has been estimated for proton-rich nuclei of mass number by a model based on the quantum mechanical tunneling mechanism through a potential barrier. The Coulomb, centrifugal and overlapping contributions to the barrier have been considered within the spherical nucleus approximation. The present calculation method has been shown to be adequate in reproducing the existing experimental half-life data for ¹⁹Mg, ⁴⁵Fe, ⁴⁸Ni, and ⁵⁴Zn 2p-emitter nuclides within a factor six. For ⁶⁷Kr parent nucleus the calculated partial 2p-decay half-life has been found to be ten times greater than the recent, unique measured value at RIKEN Nishina Center. Prediction for new, yet unmeasured cases of two-proton radioactivity are also reported.