https://doi.org/10.1140/epjp/s13360-023-03959-6
Regular Article
Theoretical studies on structural properties and decay modes of 
119 isotopes
1
Department of Physics, Aligarh Muslim University, 202002, Aligarh, India
2
Department of School Education, Govt of Union Territory of Jammu and Kashmir, Jammu and Kashmir, India
3
Department of Physics, Harsh Vidya Mandir (PG) College Raisi, 247671, Haridwar, Uttarakhand, India
4
Centro de Astrofísica e Gravitação-CENTRA, Instituto Superior Técnico-IST, Universidade de Lisboa-UL, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
5
Department of Physics and Astronomy, NIT Rourkela, 769008, Odisha, India
6
School of Pure and Applied Physics, Kannur University, Payyanur Campus, Payyanur, 670327, Kerala, India
7
Department of Physics, University of Calicut, 673635, Kerala, India
8
Institute of Physics, Sachivalaya Marg, 751005, Bhubaneswar, India
Received:
27
January
2023
Accepted:
7
April
2023
Published online:
27
May
2023
Within the axially deformed relativistic mean field with 
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 
A 375 are computed. Further, a competition between possible decay modes such as α-decay, 
-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 A 375 and thus being the dominant decay channel in this mass range and there is no possibility of –decay for the considered isotopic chain. In addition, we forecasted the α–decay chain of fission survival nuclides, i.e. 
and found as one α chain from 
and 
, 
chains from 
and 
consistently, 
chains from 
and 
consistently, 
chains from 
consistently, six consistent α chains from 
. 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 exhibit 
chains followed by SF, isotopes 
exhibit 
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 
(RMF) agree with half-life values computed using experimental 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.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
