Eur. Phys. J. A (2010) 45: 57-60
https://doi.org/10.1140/epja/i2010-10974-2

Regular Article - Theoretical Physics

Proton radioactivity: The case for ^53mCo proton-emitter isomer

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

^* e-mail: emil@cbpf.br

Received: 9 March 2010
Accepted: 13 April 2010
Published online: 20 May 2010

Abstract

The partial proton emission half-life for ^53mCo unstable isomer is re-examined in the framework of a semiempirical model based on tunneling through a Coulomb-plus-centrifugal-plus-overlapping potential barrier within the spherical nucleus approximation. It is shown that the known measured half-life value of 17s is compatible with a large prolate shape for ^53mCo proton emitter and a high angular momentum ℓ = 11 assigned to the proton transition to the ground state of ⁵²Fe .