Regular Article - Theoretical Physics
Proton radioactivity with a Yukawa effective interaction
P.G. Department of Physics, Sambalpur University, Jyoti Vihar, Burla, 768019, Orissa, India
2 Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700 064, Kolkata, India
Accepted: 21 July 2011
Published online: 9 August 2011
The half-lives of proton radioactivity of proton emitters are investigated theoretically. Proton-nucleus interaction potentials are obtained by folding the densities of the daughter nuclei with a finite-range effective nucleon-nucleon interaction having Yukawa form. The Wood-Saxon density distributions for the nuclei used in calculating the nuclear as well as the Coulomb interaction potentials are predictions of the interaction. The quantum mechanical tunneling probability is calculated within the WKB framework. These calculations provide reasonable estimates for the observed proton radioactivity lifetimes. The effects of neutron-proton effective mass splitting in neutron-rich asymmetric matter as well as the nuclear matter incompressibility on the decay probability are investigated.
© SIF, Springer-Verlag Berlin Heidelberg, 2011