Theoretical studies on structural properties and decay modes of 284375^{284-375}119 isotopes

Sep 20, 2017
14 pages
Published in:
  • Eur.Phys.J.Plus 138 (2023) 5, 467
  • Published: May 27, 2023
e-Print:

Citations per year

201920202021202210
Abstract: (Springer)
Within the axially deformed relativistic mean field with NL3\hbox {NL3}^* parametrisation, the different bulk properties like binding energy, quadrupole deformation parameter, separation energies, density profile and shape co-existence for Z = 119 isotopic chain within the mass range 284 \leA\le 375 are computed. Further, a competition between possible decay modes such as α-decay, β\beta-decay and spontaneous fission (SF) of the isotopic chain of Z = 119 superheavy nuclei under study is systematically analysed within self-consistent relativistic mean field model and a close agreement is noticed among the calculations performed using various semi-empirical formulae and also with the estimations made by finite range droplet model (FRDM) wherever available. Our analysis confirmed that α–decay is restricted within the mass range 284 \leA\le 375 and thus being the dominant decay channel in this mass range and there is no possibility of β\beta–decay for the considered isotopic chain. In addition, we forecasted the α–decay chain of fission survival nuclides, i.e. 284296119^{284-296}119 and found as one α chain from 284119^{284} 119 and 296119^{296} 119, 2α2 \alpha chains from 285119^{285}119 and 295119^{295} 119 consistently, 3α3\alpha chains from 286119^{286} 119 and 294119^{294} 119 consistently, 4α4 \alpha chains from 287119^{287} 119 consistently, six consistent α chains from 288293119^{288-293} 119. A comparative study of SF and α-decay half-live computed using the formula of Santhosh et al and Coulomb proximity potential model (CPPM), respectively, for the fission surviving isotopic chain reveals that isotopes 288293119^{288-293} 119 exhibit 6α6\alpha chains followed by SF, isotopes 295,296119^{295,296} 119 exhibit 4α4\alpha chains followed by SF, and the rest of the nuclei show continuous α chains. This study has also established that the alpha half-life values computed using Qα\hbox {Q}_\alpha (RMF) agree with half-life values computed using experimental Qα\hbox {Q}_\alpha values within 1 order difference. Thus, such studies can be of great significance to the experimentalists in very near future for synthesizing the isotopes of Z = 119 superheavy nuclei.
Note:
  • 14 pages, 6 figures. arXiv admin note: text overlap with arXiv:1611.00232, arXiv:1704.03156