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Shape coexistence in 66Se

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Title
Shape coexistence in 66Se
Author(s)
Elekes, Z.; Panin, V.; Rodriguez, T.R.; Sieja, K.; Deuk Soon Ahn; Al-Adili, A.; Baba, H.; Stefanescu, A.I.; Cook, K.J.; Dósa, Cs.; Fukuda, N.; Gao, J.; Gibelin, J.; Kevin Insik Hahn; Halasz, Z.; Huang, S.W.; Isobe, T.; Juhasz, M.M.; Da Hee Kim; Kobayashi, T.; Kondo, Y.; Korkulu, Z.; Kurihara, A.; Kuti, I.; Miki, H.; Miki, K.; Motobayashi, T.; Otsu, H.; Saastamoinen, A.; Sasano, M.; Sato, H.; Shimada, T.; Shimizu, Y.; Sobotka, L.G.; Stefanescu, I.; Laszlo Stuhl; Suzuki, H.; Takeda, H.; Togano, Y.; Tomai, T.; Trache, L.; Tudor, D.; Uesaka, T.; Utsuki, Y.; Wang, H.; Yasuda, A.; Yoneda, K.; Yoshitome, Y.
Publication Date
2023-09
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v.844
Publisher
Elsevier B.V.
Abstract
The nuclear structure of 66Se, nucleus beyond the N=Z line on the proton-rich side of the valley of stability, was investigated by the neutron knock-out reaction 67Se(12C,X)66Se using a 12C target. The analysis of the singles spectrum of the γ-rays emitted during the de-excitation of the populated low-lying excited states revealed two previously detected (927(4) keV, 1460(32) keV) and three new (744(6) keV, 1210(17) keV, 1661(23) keV) transitions. The 744-keV, the 1210-keV, and the 1460-keV transitions were found to be in coincidence with the one at 927 keV. The spectrum coincident with the 927-keV transition showed a further possible transition at 299(35) keV, which was obscured by significant atomic background in the singles spectrum. This transition might correspond to a peak previously reported at 273(5) keV that could not be assigned to 66Se unambiguously. Based on a comparison of the experimental data to theoretical calculations, four new excited states are proposed which suggest that 66Se exhibits shape coexistence. © 2023 The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/14578
DOI
10.1016/j.physletb.2023.138072
ISSN
0370-2693
Appears in Collections:
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
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