Speaker
Description
Neutron-rich nuclei around the closed neutron shell N = 126 are of great importance for understanding the astrophysical r-process, specially for the solar r-abundance distribution [1,2]. These radioactive isotopes can also be used as projectiles for synthesizing super-heavy nuclei which is one of the most interesting challenges in nuclear physics. In the present work, inspired from recent experimental and theoretical studies on N=126, we have investigated the decay modes such as α-decay, β--decay, and β+/EC-decay, and spontaneous fission (SF) for N=126 within the range 54≤Z≤98 by the calculation of half-lives using several empirical formulas. For α-decay we have used QF formula [3], for weak decay we adopt an empirical formula given by Fiset and Nix [4] and for spontaneous fission we have used modified Bao formula [5]. Firstly, these formulas tested to reproduced experimental half-lives and known decay modes of isotones of N=126 which are in consequence applied to estimate half-lives and decay modes of unknown isotones of N=126. These decay properties are expected to shed light on the r-process waiting-point nuclei.
References: -
1. H. Grawe, K. Langanke, and G. Martínez-Pinedo, Rep Prog Phys. 70, 1525 (2007).
2. Y. S. Watanabe et al. Phys. Rev. Lett. 115, 172503 (2015).
3. A. R. Farhan and M. M. Sharma, Phys. Rev. C, 73, 045803 (2006).
4. G. Saxena et al., Phys. Scr. 96, 125304 (2021).
5. E. Fiset and J. Nix, Nucl. Phys. A, 193, 647 (1972).
6. G. Saxena et al., J. Phys. G: Nucl. Part. Phys. 48, 055103 (2021).
| Length of presentation requested | Oral presentation: 17 min + 3 min questions |
|---|---|
| Please select between one and three keywords related to your abstract | Nuclear physics - theory |
| 2nd keyword (optional) | Origin of the Solar System |
