Structural and decay properties of nuclei appearing in the alpha-decay chains of (296,298,300,302,304)120 within the relativistic mean field formalism
Document Type
Article
Publication Date
8-10-2021
Abstract
An extensive study of alpha-decay half-lives for various decay chains of isotopes of Z = 120 is performed within the axially deformed relativistic mean-field (RMF) formalism by employing the NL3, NL3*, and DD-ME2 parameter set. The structural properties of the nuclei appearing in the decay chains are explored. The binding energy, quadrupole deformation parameter, root-mean-square charge radius, and pairing energy are calculated for the even-even isotopes of Z = 100-120, which are produced in five different alpha-decay chains, namely, (296)120 -> No-260, (298)120 -> No-262, (300)120 -> No-264, (302)120 -> No-266, and (304)120 -> No-268. A superdeformed prolate ground state is observed for the heavier nuclei, and gradually the deformation decreases towards the lighter nuclei in the considered decay chains. The RMF results are compared with various theoretical predictions and experimental data. The alpha-decay energies are calculated for each decay chain. To determine the relative numerical dependency of the half-life for a specific alpha-decay energy, the decay half-lives are calculated using four different formulas, namely, Viola-Seaborg, Alex-Brown, Parkhomenko-Sobiczewski and Royer for the above said five alpha-decay chain. We notice a firm dependency of the half-life on the alpha-decay formula in terms of Q(alpha)-values for all decay chains. Further, this study also strengthens the prediction for the island of stability in terms of magic number at the superheavy valley in the laboratories.
Keywords
Relativistic mean field, Nuclear structure, Decay energy and half-life, Isospin asymmetry, Superheavy nuclei
Divisions
PHYSICS
Funders
FOSTECT Project (FOSTECT.2019B.04),Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Fundacao Amazonia de Amparo a Estudos e Pesquisas (FAPESPA) (2017/05660-0),Department of Atomic Energy (DAE) Board of Research in Nuclear Sciences (BRNS) (58/14/12/2019-BRNS),Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
Publication Title
Modern Physics Letters A
Volume
36
Issue
24
Publisher
World Scientific Publishing
Publisher Location
5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE