Low-lying excited states in $^{62}$Ge investigated by multinucleon knock-out reaction

• Published in: Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2024, Vol.51 (10)
• Main Authors: Elekes, Z, Panin, V, Rodríguez, T.R, Sieja, K, Ahn, D.S, Al-Adili, A, Baba, H, Stefanescu, A.I, Cook, K.J, Dósa, Cs, Fukuda, N, Gao, J, Gibelin, J, Hahn, K.I, Halász, Z, Huang, S.W, Isobe, T, Juhász, M.M, Kim, D, Kobayashi, T, Kondo, Y, Korkulu, Z, Kurihara, A, Kuti, I, Miki, H, Miki, K, Motobayashi, T, Otsu, H, Saastamoinen, A, Sasano, M, Sato, H, Shadhin, N.H, Shimada, T, Shimizu, Y, Stefanescu, I.C, Stuhl, L, Suzuki, H, Takeda, H, Togano, Y, Tomai, T, Trache, L, Tudor, D, Uesaka, T, Utsuki, Y, Wang, H, Yasuda, A, Yoneda, K, Yoshitome, Y
• Format: Article
• Language: English
• Subjects: Nuclear Experiment; Physics
• ISSN: 0954-3899; 1361-6471
• DOI: 10.1088/1361-6471/ad6fbd

The low-energy states of the proton-rich nucleus $^{62}$Ge were studied by the multinucleon knock-out reaction $^{67}$Se($^{12}$C,X)$^{62}$Ge using a $^{12}$C target. The analysis of the Doppler-corrected singles spectrum of the γ rays showed two transitions at 744(20) keV and 948(17) keV, which were found to be in coincidence with each other, forming a cascade and establishing two states at 948(17) keV and 1692(26) keV. The 744 keV transition was detected for the first time, and based on a comparison of the experimental data to shell-model and symmetry-conserving-configuration-mixing-model calculations, it connects the second and first 2$^{+}$ levels. The beyond-mean-field model suggests that these states belong to two different bands with triaxial features and similar deformation.