RT Journal Article
T1 Detailed structure of Sn 131 populated in the β decay of isomerically purified 131 in states
A1 Benito García, Jaime
A1 Fraile Prieto, Luis Mario
A1 Galve Lahoz, Pablo
A1 Ibáñez García, Paula Beatriz
A1 Illana Sisón, Andrés
A1 López Montes, Alejandro
A1 Rodríguez Murias, Javier
A1 Olaizola Mampaso, Bruno
A1 Sánchez Parcerisa, Daniel
A1 Sánchez Tembleque Verbo, Víctor
A1 Udías Moinelo, José Manuel
A1 Vedia Fernández, María Victoria
A1 Villa Abaunza, Amaia
AB 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.
PB American Physical Society
SN 2469-9985
YR 2024
FD 2024-07-26
LK https://hdl.handle.net/20.500.14352/134709
UL https://hdl.handle.net/20.500.14352/134709
LA eng
NO 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.
NO Artículo firmado por 92 autores. IDS and IGISOL Collaboration.UMO-2015/18/E/ST2/00217,UMO-2015/18/M/ST2/00523,UMO-2019/33/N/ST2/03023,2021/WK/07,CERN/ISOLDE
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO European Commission
NO Agencia Estatal de Investigación (España)
NO Universidad Complutense de Madrid
NO Ministry of Science and Higher Education (Poland)
NO Polish National Science Center (Poland)
NO Fundação para a Ciência e a Tecnologia (Portugal)
NO Federal Ministry of Education and Research (Germany)
NO Institute of Atomic Physics (Romania)
NO Science and Technology Facilities Council (UK)
NO Research Foundation - Flanders
NO Katholieke Universiteit Leuven
DS Docta Complutense
RD 8 jun 2026