α-Cluster structure above double-shell closures and α-decay of 104Te

M.A Souza,H Miyake,T Borello-Lewin,C.A Da Rocha,C Frajuca

doi:10.1016/j.physletb.2019.04.019

Abstract

An analysis of the α+core properties of 104Te along with a global discussion on the α-cluster structure above the double-shell closures is presented from the viewpoint of the local potential model. The α+core interaction is described by a nuclear potential of (1 + Gaussian)×(W.S. + W.S.3) shape with two free parameters, which has been successfully tested in nuclei of different mass regions. The model produces Qα values and α-decay half-lives for 104Te in agreement with the 2018 experimental data of Auranen et al. in the energy range 5.13 MeV<Qα<5.3 MeV using an α preformation factor Pα=1. The comparison of the calculated reduced α-widths for the ground state bands of 104Te, 94Mo and 212Po indicates that 104Te has an α-cluster degree significantly higher than 94Mo and much higher than 212Po. These results point to 104Te as a preferential nucleus for α-clustering in the N,Z=50 region and corroborate the statement on the superallowed α-decay in 104Te.

Highlights

The α-cluster model has been used to successfully describe the spectroscopic properties of nuclei from different mass regions, with different approaches, consolidating itself as an important topic of the nuclear structure
The binary α + core structure has been studied in several works, with emphasis on nuclei in which the core has doubly closed shell, such as 20Ne, 44Ti, 60Zn, 94Mo, and 212Po
There is a great interest in the 104Te nucleus, since an α-decay experimental observation of this nucleus can indicate the presence of the α+100Sn structure, as well as provide information on the nuclear structure of this mass region due to the double shell closure N, Z = 50

Summary

Introduction

The α-cluster model has been used to successfully describe the spectroscopic properties of nuclei from different mass regions, with different approaches, consolidating itself as an important topic of the nuclear structure. [3, 8] to describe the ground state bands of nuclei of different mass regions with the W.S.+W.S.3 nuclear potential.

Results

Conclusion