Deformation dependence of 2p-radioactivity half-lives: probe with a new formula across the mass region with Z < 82. (1st January 2023)

• Record Type: Journal Article
• Authors: Saxena, G; Aggarwal, Mamta; Singh, D; Jain, A; Sharma, P K; Yadav, H L
• Is Part Of: Journal of physics. Volume 50:Number 1(2023)
• Publication Date: 2023-01-01
• Subjects: 2p-decay -- half-lives -- deformation -- shape coexistence -- empirical formula; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/ac991d
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: Effect of deformation on half-life of two-proton (2p) radioactivity is investigated across the periodic chart for nuclei with Z < 82. 2p-decay half-lives are estimated by employing our newly proposed semi-empirical formula wherein the nuclear deformation has been incorporated in a phenomenological way. Robustness of the formula is demonstrated as it estimates the measured values quite accurately and, hence, reliably applied to predict the other possible 2p-emitters. For many proton rich nuclei for which experimental data on the decay energies are not available, we have used the theoretical values obtained from our calculations using the relativistic mean-field approach. The uncertainties in the theoretical decay energy values are minimised by machine learning technique. Correlation of 2p-radioactivity with 2p-halo and deformation is probed. Our calculations show the phenomenon of shape coexistence in several 2p-emitters, wherein the prolate shape is found to be more predominant for the ground state.