학술논문
Shape coexistence in 66Se
Document Type
article
Author
Z. Elekes; V. Panin; T.R. Rodríguez; K. Sieja; D.S. Ahn; A. Al-Adili; H. Baba; A.I. Stefanescu; K.J. Cook; Cs. Dósa; N. Fukuda; J. Gao; J. Gibelin; K.I. Hahn; Z. Halász; S.W. Huang; T. Isobe; M.M. Juhász; D. Kim; T. Kobayashi; Y. Kondo; Z. Korkulu; A. Kurihara; I. Kuti; H. Miki; K. Miki; T. Motobayashi; H. Otsu; A. Saastamoinen; M. Sasano; H. Sato; T. Shimada; Y. Shimizu; L.G. Sobotka; I. Stefanescu; L. Stuhl; H. Suzuki; H. Takeda; Y. Togano; T. Tomai; L. Trache; D. Tudor; T. Uesaka; Y. Utsuki; H. Wang; A. Yasuda; K. Yoneda; Y. Yoshitome
Source
Physics Letters B, Vol 844, Iss , Pp 138072- (2023)
Subject
Language
English
ISSN
0370-2693
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.