Journal
NUCLEAR PHYSICS A
Volume 1019, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nuclphysa.2021.122379
Keywords
Relativistic mean field; Alpha decay; Q-value; Half-lives; Analytical formula; Superheavy nuclei
Categories
Funding
- FOSTECT Project [FOSTECT.2019B.04]
- FAPESP [2017/05660-0]
- Board of Research in Nuclear Sciences (BRNS) , Department of Atomic Energy (DAE), Govt. of India [58/14/12/2019-BRNS]
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The study investigated the alpha-decay half-lives of 204 superheavy nuclei using the relativistic mean-field model with the NL3* parameter set. The results showed a good consistency between experimental data and predictions from UDL, FRDM, and WS4 for decay energies and corresponding half-lives.
The alpha-decay half-lives of 204 superheavy nuclei covering the range 114 <= Z <= 126 have been investigated using the relativistic mean-field model (RMF) for NL3* parameter set. The ground state bulk properties such as binding energy, quadrupole deformation parameter (beta(2)), and root-mean-square charge radii for these nuclei are analyzed. Four different semi-empirical formulae, namely, the universal decay law (UDL), the Viola-Seaborg (VSS) formula, the modified universal decay law (MUDL), and the modified Brown formula (MBrown), are used to obtain the alpha-decay half-lives for the considered nuclei. To examine the applicability of relativistic mean-field model within NL3* parametrization, the alpha-decay energies, and the half-lives of a few known superheavy nuclei within the range 102 <= Z <= 118 are calculated and the results are compared with the experimental data along with the theoretical predictions. The alpha-decay energies (Q-values) are estimated from the binding energies of the parent, and daughter from the RMF (NL3*) parameter set. The calculated results are compared with macroscopic-microscopic Finite-Range-Droplet Model (FRDM), Global Nuclear Mass Model (WS3, WS4), Weizsacker-Skyrme mass model (WS*) predictions, and the experimental data, wherever available. The possible standard deviations are also estimated for experimental and various theoretical predictions. We find a good consistency for the experimental-to-UDL, FRDM-to-UDL, and WS4-to-UDL estimates of the decay energy and corresponding half-life. The present analysis provides the theoretical predictions within the microscopic model for the upcoming experiments on the superheavy region. (C)& nbsp;2021 Elsevier B.V. All rights reserved.
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