Folding model analysis of alpha radioactivity

Abstract

Radioactive decay of nuclei via emission of $\alpha$ particles has been studied theoretically in the framework of a superasymmetric fission model using the double folding (DF) procedure for obtaining the $\alpha$-nucleus interaction potential. The DF nuclear potential has been obtained by folding in the density distribution functions of the $\alpha$ nucleus and the daughter nucleus with a realistic effective interaction. The M3Y effective interaction has been used for calculating the nuclear interaction potential which has been supplemented by a zero-range pseudo-potential for exchange along with the density dependence. The nuclear microscopic $\alpha$-nucleus potential thus obtained has been used along with the Coulomb interaction potential to calculate the action integral within the WKB approximation. This subsequently yields microscopic calculations for the half lives of $\alpha$ decays of nuclei. The density dependence and the exchange effects have not been found to be very significant. These calculations provide reasonable estimates for the lifetimes of $\alpha$ radioactivity of nuclei.

7 pages including 1 figure

Cited by in corpus (6)

• A new microscopic nucleon-nucleon interaction derived from relativistic mean field theory
• Nuclear incompressibility using the density dependent M3Y effective interaction
• Simple parametrization of $\alpha$-decay spectroscopic factor in $150\le A\le 200$ region
• Influence of the Pauli exclusion principle on the alpha decay
• Predictions of alpha-decay half-lives based on potentials from self-consistent mean-field models
• Modes of decay in neutron-rich nuclei