Exotic collective excitation patterns in triaxially deformed 131Ba

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dc.contributor.authorWei, Rui
dc.contributor.authorLawrie, Elena A.
dc.contributor.authorZhou, Hou-Bing
dc.date.accessioned2025-01-17T08:47:46Z
dc.date.available2025-01-17T08:47:46Z
dc.date.issued2024
dc.description.abstractIn the last two decades, several unique phenomena in triaxially deformed nuclei, such as chiral doublet bands and wobbling motion have been revealed. Up to now, there are still many open questions which require further experimental and theoretical studies. To explore the collective motion in 131Ba, an experiment was performed using the XTU Tandem accelerator in the Legnaro laboratory, Italy. High-spin states of 131Ba have been populated via the heavy-ion fusion-evaporation 122Sn(13C, 4n) reaction. g-rays, charged particles and neutrons emitted from the residues were detected by the GALILEO array, EUCLIDES silicon ball, and the Neutron Wall, respectively. A total of 1.2 ×109 triple- or higher-fold events were collected by the GALILEO data acquisition system. The g-g-g coincidence events were sorted into a three-dimensional histogram (cube) and the analysis was carried out with the RADWARE and GASPWARE software packages. Through analysis of the coincidences between g-rays, the most comprehensive level schemes of 131Ba to date was deduced from the present work. The extended level-scheme consists of 15 rotational bands, and newly observed transitions are marked in red. Three nearly degenerate pairs of doublet bands (Band 3–8) are identified in 131Ba. Two pairs of chiral doublets (Band 3–6) with configuration πh11/2(g7/2,d5/2)×νh11/2 are interpreted as a set of pseudospin-chiral quartet bands.
dc.identifier.citationWei, R., Ataç-Nyberg, A., Bäck, T., Cederwall, B. and Tucholski, A., 2024. Exotic collective excitation patterns in triaxially deformed 131Ba. Wuli xuebao, 73(11).
dc.identifier.urihttps://doi.org/10.7498/aps.73.20240212
dc.identifier.urihttps://hdl.handle.net/10566/19804
dc.language.isozh
dc.publisherInstitute of Physics, Chinese Academy of Sciences
dc.subjectChirality
dc.subjectHigh-spin states
dc.subjectOctupole correlation
dc.subjectPseudospin
dc.subjectWobbling motion
dc.titleExotic collective excitation patterns in triaxially deformed 131Ba
dc.typeArticle

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