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Signature splitting of the g(7/2)[404]7/2(+) bands in Ba-131 and Ce-133
Chinese Acad Sci, Inst Modern Phys, Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China.;Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China..
Univ Paris Saclay, CNRS IN2P3, IJCLab, F-91405 Orsay, France..
KTH, School of Engineering Sciences (SCI), Physics.ORCID iD: 0000-0003-1996-0805
KTH, School of Engineering Sciences (SCI), Physics.ORCID iD: 0000-0003-1771-2656
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2021 (English)In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 104, no 6, article id 064304Article in journal (Refereed) Published
Abstract [en]

Excited states in Ba-131 and Ce-133 were studied using in-beam gamma-ray spectroscopy through the Sn-122(C-13, 4n) Ba-133 and Te-125(C-12, 4n) Ce-133 reactions, respectively. A strongly coupled band, associated with the nu g(7/2) [404]7/2(+) configuration, was identified in Ba-131 and Ce-133. It is the first time to observe the nu g(7/2) [404]7/2(+) bands in the N = 75 isotones. The signature partners exhibit considerable energy splitting in comparison with those in the pi g(7/2) [404]7/2(+) bands in the odd-A Ta and Re isotopes. Extensive cranked shell model and quasiparticle-plus-triaxial-rotor model calculations reveal the origin of the signature splitting, which depends not only on the triaxiality, but also on the configuration mixing with nearby low- j orbitals.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2021. Vol. 104, no 6, article id 064304
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Subatomic Physics
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URN: urn:nbn:se:kth:diva-306858DOI: 10.1103/PhysRevC.104.064304ISI: 000730839900001Scopus ID: 2-s2.0-85121154713OAI: oai:DiVA.org:kth-306858DiVA, id: diva2:1624859
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QC 20220105

Available from: 2022-01-05 Created: 2022-01-05 Last updated: 2022-06-25Bibliographically approved

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Bäck, TorbjörnCederwall, Bo

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