2026-06-08T00:21:15Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/1347092026-04-14T00:02:51Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Benito García, Jaime author Fraile Prieto, Luis Mario author Galve Lahoz, Pablo author Ibáñez García, Paula Beatriz author Illana Sisón, Andrés author López Montes, Alejandro author Rodríguez Murias, Javier author Olaizola Mampaso, Bruno author Sánchez Parcerisa, Daniel author Sánchez Tembleque Verbo, Víctor author Udías Moinelo, José Manuel author Vedia Fernández, María Victoria author Villa Abaunza, Amaia 2026-04-13T18:21:11Z 2026-04-13T18:21:11Z 2024-07-26 Benito, J., Fraile, L. M., Korgul, A., Piersa-Siłkowska, M., Jaries, A., Stryjczyk, M., ... & IDS and IGISOL Collaboration. (2024). Detailed structure of Sn 131 populated in the β decay of isomerically purified in 131 states. Physical Review C, 110(1), 014328. 2469-9985 10.1103/physrevc.110.014328 https://hdl.handle.net/20.500.14352/134709 2469-9993 https://dx.doi.org/10.1103/physrevc.110.014328 https://journals.aps.org/prc/abstract/10.1103/PhysRevC.110.014328 The excited structure of the single-hole nucleus Sn131 populated by the β- decay of In131 was investigated in detail at the ISOLDE facility at CERN. This new experiment took advantage of isomeric purification capabilities provided by resonant ionization, making it possible to independently study the decay of each isomer for the first time. The position of the first-excited νh11/2 neutron-hole state was confirmed via an independent mass spectroscopy experiment performed at the Ion Guide Isotope Separator On-Line facility at the University of Jyväskylä. The level scheme of Sn131 was notably expanded with the addition of 31 new γ-ray transitions and 22 new excited levels. The γ-emitting excited levels above the neutron separation energy in Sn131 were investigated, revealing a large number of states, which in some cases decay by transitions to other neutron-unbound states. Our analysis showed the dependence between the population of these states in Sn131 and the β-decaying In131 state feeding them. Profiting from the isomer selectivity, it was possible to estimate the direct β feeding to the 3/2+ ground and 11/2- isomeric states, disentangling the contributions from the three indium parent states. This made possible to resolve the discrepancies in logft for first-forbidden transitions observed in previous studies, and to determine the β-delayed neutron decay probability (Pn) values of each indium isomers independently. The first measurement of subnanosecond lifetimes in Sn131 was performed in this work. A short T1/2=18(4)-ps value was measured for the 1/2+ neutron single-hole 332-keV state, which indicates an enhanced l-forbidden M1 behavior for the ν3s1/2-1→ν3d3/2-1 transition. The measured half-lives of high-energy states populated in the β decay of the (21/2+) second isomeric state (In131m2) provided valuable information on transition rates, supporting the interpretation of these levels as core-excited states analogous to those observed in the doubly-magic Sn132. eng Attribution 4.0 International Detailed structure of Sn 131 populated in the β decay of isomerically purified 131 in states journal article 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URL https://docta.ucm.es/bitstreams/aa9a9afe-1ae6-49fa-b05c-817b087ad94a/download File MD5 2629cc8c9536c9896dcf0f9de8316fcb 2980665 application/pdf PhysRevC.110.014328.pdf