Low-lying excited states in 62Ge investigated by multinucleon knock-out reaction

IF 3.4 3区物理与天体物理 Q2 PHYSICS, NUCLEAR Journal of Physics G: Nuclear and Particle Physics Pub Date : 2024-09-04 DOI:10.1088/1361-6471/ad6fbd

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, N H Shadhin, T Shimada, Y Shimizu, I C 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

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Abstract

The low-energy states of the proton-rich nucleus ⁶²Ge were studied by the multinucleon knock-out reaction ⁶⁷Se(¹²C,X)⁶²Ge using a ¹²C 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.

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通过多核子敲除反应研究 62Ge 中的低洼激发态

利用 12C 靶件，通过多核敲除反应 67Se(12C,X)62Ge 研究了富质子核 62Ge 的低能态。对 γ 射线的多普勒校正单谱分析表明，在 744(20) keV 和 948(17) keV 有两个跃迁，这两个跃迁相互重合，形成级联，并在 948(17) keV 和 1692(26) keV 建立了两个态。根据实验数据与壳模型和对称守恒配置混合模型计算结果的比较，首次探测到了 744 keV 的转变，它连接了第二和第一个 2+ 水平。超越均场模型表明，这些态属于两个不同的带，具有三轴特征和相似的变形。

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来源期刊

Journal of Physics G: Nuclear and Particle Physics 物理-物理：核物理

CiteScore

7.60

自引率

5.70%

发文量

105

审稿时长

1 months

期刊介绍： Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields. All aspects of fundamental nuclear physics research, including: nuclear forces and few-body systems; nuclear structure and nuclear reactions; rare decays and fundamental symmetries; hadronic physics, lattice QCD; heavy-ion physics; hot and dense matter, QCD phase diagram. All aspects of elementary particle physics research, including: high-energy particle physics; neutrino physics; phenomenology and theory; beyond standard model physics; electroweak interactions; fundamental symmetries. All aspects of nuclear and particle astrophysics including: nuclear physics of stars and stellar explosions; nucleosynthesis; nuclear equation of state; astrophysical neutrino physics; cosmic rays; dark matter. JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.