Decay spectroscopy of strong β-delayed neutron emitters above N=82

by Monika Piersa-Silkowska (CERN)

Tuesday 21 Mar 2023, 16:00 → 17:00 Europe/Zurich

CERN

 

The region around 132Sn, the heaviest doubly magic nucleus far from the valley of beta stability, is of great relevance for the development of the theoretical description of neutron-rich nuclei. New experimental data for nuclides located south-east of 132Sn allow for a better understanding of phenomena that occur when the N/Z ratio becomes large, such as rare processes of β-delayed multiple-neutron emission. The properties of exotic nuclei in this region constitute a crucial input for simulations of the rapid neutron capture nucleosynthesis process (r process) that involves exotic nuclides being either one or multineutron β-delayed precursors [1-3]. During the seminar, I will present the results of the beta-decay study of neutron-rich indium isotopes above N=82 [4-6], which were indicated in an r-process sensitivity study [3] to be among those β-delayed neutron emitters that have the greatest impact on the pattern of isobaric abundances produced in r-process simulations in two astrophysical scenarios.

[1] M. R. Mumpower et al., Prog. Part. Nucl. Phys. 86, 86 (2016).
[2] F. Minato, T. Marketin, and N. Paar, Phys. Rev. C 104, 044321 (2021).
[3] R. Surman, M. Mumpower, and A. Aprahamian, JPS Conf. Proc. 6, 010010 (2015).
[4] L. M. Fraile, A. Korgul et al., CERN-INTC-2015-049; INTC-P-449 (2015).
[5] M. Piersa-Siłkowska et al. (IDS Collaboration), Phys. Rev. C 104, 044328 (2021)
[6] V. H. Phong et al., Phys. Rev. Lett 129, 172701 (2022).