Detailed spectroscopy of doubly magic Sn-132



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Benito García, Jaime and Fraile Prieto, Luis Mario and Carmona, M. and Galve Lahoz, Pablo and García Díez, Miguel and Ibañez, P. and López Montes, Alejandro and Martínez, M. C. and Sánchez Parcerisa, Daniel and Sánchez Tembleque, Víctor and Udías Moinelo, José Manuel and Vedia Fernández, María Victoria and Villa Abaunza, Amaia and Otros, ... (2020) Detailed spectroscopy of doubly magic Sn-132. Physical Review C, 102 (1). ISSN 0556-2813

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The structure of the doubly magic Sn-132(50)82 has been investigated at the ISOLDE facility at CERN, populated both by the beta(-) decay of In-132 and beta(-)-delayed neutron emission of In-133. The level scheme of Sn-13(2) is greatly expanded with the addition of 68 gamma transitions and 17 levels observed for the first time in the beta decay. The information on the excited structure is completed by new gamma transitions and states populated in the beta-n decay of In-133. Improved delayed neutron emission probabilities are obtained both for In-132 and In-133. Level lifetimes are measured via the advanced time-delayed beta gamma gamma(t) fast-timing method. An interpretation of the level structure is given based on the experimental findings and the particle-hole configurations arising from core excitations both from the N = 82 and Z = 50 shells, leading to positive- and negative-parity particle-hole multiplets. The experimental information provides new data to challenge the theoretical description of Sn-132.

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© Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Artículo firmado por 88 autores. We acknowledge the support of the ISOLDE Collaboration and the ISOLDE technical teams, and by the European Union Horizon 2020 research and innovation programme under Grant Agreement No. 654002. This work was partially funded by the Spanish government via Projects No. FPA201565035-P, No. FPA-64969-P, No. FPA2017-87568-P, and No. RTI2018-098868-B-I00; the Polish National Science Center under Contracts No. UMO-2015/18/E/ST2/00217, No. UMO-2015/18/M/ST2/00523, and No. UMO2019/33/N/ST2/03023; the Portuguese FCT via CERN/FIS-NUC/0004/2015 project; the German BMBF under Contract No. 05P18PKCIA; the Romanian IFA Grant CERN/ISOLDE; and by grants from the U.K. Science and Technology Facilities Council, the Research Foundation Flanders (FWO, Belgium), the Excellence of Science program (EOS, FWO-FNRS, Belgium), and the GOA/2015/010 (BOF KU Leuven). J.B. acknowledges support from the Universidad Complutense de Madrid under the Predoctoral Grant No. CT27/16-CT28/16.

Uncontrolled Keywords:Shell nucleus sn-132; Picosecond lifetime measurements; Neutron-rich nuclei; Beta-decay; States; Fission
Subjects:Sciences > Physics > Nuclear physics
ID Code:62100
Deposited On:23 Sep 2020 09:31
Last Modified:14 Jan 2022 12:25

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