Detailed spectroscopy of doubly magic Sn-132

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IDS Collaboration , Greenlees , P T , Konki , J & Rahkila , P 2020 , ' Detailed spectroscopy of doubly magic Sn-132 ' , Physical Review C (Nuclear Physics) , vol. 102 , no. 1 , 014328 .

Title: Detailed spectroscopy of doubly magic Sn-132
Author: IDS Collaboration; Greenlees, P. T.; Konki, J.; Rahkila, P.
Contributor organization: Helsinki Institute of Physics
Date: 2020-07-29
Language: eng
Number of pages: 18
Belongs to series: Physical Review C (Nuclear Physics)
ISSN: 0556-2813
Abstract: 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.
Subject: 114 Physical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion

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