Structural properties and α-decay chains of transfermium nuclei (101≤Z≤110)

Transfermium nuclei (101 <= Z <= 110) are investigated thoroughly to describe structural properties viz. deformation, radii, shapes, magicity, etc. as well as their probable decay chains. These properties are explored using relativistic mean-field (RMF) approach and compared with other theories along with available experimental data. Neutron numbers N=152 and 162 have come forth with a deformed shell gap whereas N=184 is ensured as a spherical magic number. The region with N>168 bears witness of the phenomenon of shape transition and shape coexistence for all the considered isotopic chains. Experimental alpha-decay half-lives are compared with our theoretical half-lives obtained by using various empirical/semi-empirical formulas. The recent formula proposed by Manjunatha et al., which results best among the considered 10 formulas, is further modified by adding asymmetry dependent terms (I and I-2). This modified Manjunatha formula is utilized to predict probable alpha-decay chains that are found in excellent agreement with available experimental data. (C) 2020 Elsevier B.V. All rights reserved.