IWARA2022 - 10th International Workshop on Astronomy and Relativistic Astrophysics

Decay properties of $^{253,255}$Rf using the Relativistic Mean-Field Framework.

Not scheduled

20m

Poster (virtual)

Speaker

Joshua T. Majekodunmi (Institute of Engineering Mathematics, Faculty of Applied and Human Sciences, Universiti Malaysia Perlis, Arau, 02600, Perlis, Malaysia)

Description

Most neutron-deficient α-emitters are known to be of great relevance to the astrophysical rapid neutron-capture process (r-process) in superheavy nuclei [1, 2]. Thus, in this work, the decay properties of the newly observed 249No isotope from the α-decay of 253Rf [3] is theoretically investigated within the relativistic mean-field (RMF) framework [4,5] using the NL3* parameter set [6]. The α-decay chain of 255Rf is also considered. The RMF densities are folded with the R3Y NN potential to deduce the nuclear interaction potential between the decaying fragments. A balanced understanding of the penetration of an α-particle across the nuclear-Coulomb barrier gives an outstanding credence to the assumptions of quantum mechanics. The presence of shell/sub-shell closure is indicated by the formation of peaks along the decay chain and found to alter the conventional scaling factor of the preformed cluster-decay model (PCM) [5]. The calculated half-lives are in close agreement with the recent experimental measurement. The sensitivity of the nuclei around the shell closures can provide valuable information about the r-process abundance in this mass region.

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