Examining the stability of thermally fissile Th and U isotopes

Abstract

The properties of recently predicted thermally fissile Th and U isotopes are studied within the framework of relativistic mean field (RMF) approach using axially deformed basis. We calculated the ground, first intrinsic excited state and matter density for highly neutron-rich thorium and uranium isotopes. The possible modes of decay like $\alpha$-decay and $\beta$-decay are analyzed. We found that the neutron-rich isotopes are stable against $\alpha$-decay, however they are very much unstable against $\beta$-decay. The life time of these nuclei predicted to be tens of second against $\beta$-decay. If these nuclei utilize before their decay time, a lots of energy can be produced within the help of multi-fragmentation fission. Also, these nuclei have a great implication in astrophysical point of view. The total nucleonic densities distribution are calculated, from which the clusters inside the parent nuclei are determined. %Most of the thorium isotopes are $\alpha$ emitters, where as some %of them have short half-lives. In some cases, we found the isomeric states with energy range from 2 to 3 MeV and three minima in the potential energy surface of ${}^{228-230}$Th and ${}^{228-234}$U isotopes.

11 Pages, 8 figures, Accepted in Phys. Rev. C

References in corpus (5)

• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• The Skyrme Interaction in finite nuclei and nuclear matter
• Multidimensionally-constrained relativistic mean-field study of triple-humped barriers in actinides
• Shape co-existence and parity doublet in Zr isotopes
• Exotic fission properties of highly neutron-rich Uranium isotopes

Cited by in corpus (6)

• Ternary fission within the temperature dependent relativistic mean field approach
• Nuclear structure and decay properties of even-even nuclei in $Z=70-80$ drip-line region
• Relative mass distributions of neutron-rich thermally fissile nuclei within statistical model
• The role of the elemental nature of A=3 nuclei in neutron-rich nuclei
• Modes of decay in neutron-rich nuclei
• Unearthing radial independence for prediction of alpha-decay half-lives