학술논문
133In: A Rosetta Stone for decays of r-process nuclei
Document Type
Working Paper
Author
Xu, Z. Y.; Madurga, M.; Grzywacz, R.; King, T. T.; Algora, A.; Andreyev, A. N.; Benito, J.; Berry, T.; Borge, M. J. G.; Costache, C.; De Witte, H.; Fijalkowska, A.; Fraile, L. M.; Fynbo, H. O. U.; Gottardo, A.; Halverson, C.; Harkness-Brennan, L. J.; Heideman, J.; Huyse, M.; Illana, A.; Janiak, Ł.; Judson, D. S.; Korgul, A.; Kurtukian-Nieto, T.; Lazarus, I.; Lică, R.; Lozeva, R.; Marginean, N.; Marginean, R.; Mazzocchi, C.; Mihai, C.; Mihai, R. E.; Morales, A. I.; Page, R. D.; Pakarinen, J.; Piersa-Siłkowska, M.; Podolyák, Zs.; Sarriguren, P.; Singh, M.; Sotty, Ch.; Stepaniuk, M.; Tengblad, O.; Turturica, A.; Van Duppen, P.; Vedia, V.; Viñals, S.; Warr, N.; Yokoyama, R.; Yuan, C. X.
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Subject
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Abstract
The $\beta$ decays from both the ground state and a long-lived isomer of $^{133}$In were studied at the ISOLDE Decay Station (IDS). With a hybrid detection system sensitive to $\beta$, $\gamma$, and neutron spectroscopy, the comparative partial half-lives (logft) have been measured for all their dominant $\beta$-decay channels for the first time, including a low-energy Gamow-Teller transition and several First-Forbidden (FF) transitions. Uniquely for such a heavy neutron-rich nucleus, their $\beta$ decays selectively populate only a few isolated neutron unbound states in $^{133}$Sn. Precise energy and branching-ratio measurements of those resonances allow us to benchmark $\beta$-decay theories at an unprecedented level in this region of the nuclear chart. The results show good agreement with the newly developed large-scale shell model (LSSM) calculations. The experimental findings establish an archetype for the $\beta$ decay of neutron-rich nuclei southeast of $^{132}$Sn and will serve as a guide for future theoretical development aiming to describe accurately the key $\beta$ decays in the rapid-neutron capture (r-) process.