Three-quasineutron γ-band in 127Xe

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 : 2023-05-24 DOI:10.1088/1361-6471/acd86a

Saikat Chakraborty, H. Sharma, S. Jehangir, S. Tiwary, C. Majumder, A. K. Gupta, G. Bhat, J. Sheikh, N. Rather, Polash Banerjee, S. Ganguly, S. Rai, P. Popli, S. Muralithar, R. Singh, S. Bhattacharjee, Suresh Kumar, Mayank Singh, Ashok Kumar V, R. Palit

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Abstract

Structures of negative parity multi-quasiparticle states in 127Xe have been investigated through in-beam γ-ray spectroscopy. Excited states were populated via 122Sn(9Be, 4nγ)127Xe fusion-evaporation reaction at Ebeam = 48 MeV. Two new negative parity bands have been identiﬁed and their structures have been discussed using the triaxial projected shell model (TPSM) approach. One of the bands is established above the Iπ = 27/2- state at 3702 keV and based on the experimental inferences and TPSM results, this band is interpreted as a γ-band built on a three-quasineutron conﬁguration. The second sequence, found above Iπ = 31/2- state at 4848 keV, is proposed to have a two-proton aligned conﬁguration (νh11/2 ⊗ πh11/2 2), considering the properties of this band with the neighbouring isotopes. The analysis of the TPSM wave function substantiates the proposed interpretation of this band.

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127Xe带的三个准中子

用γ射线能谱研究了127Xe中负宇称多准粒子态的结构。在电子束=48MeV下，通过122Sn（9Be，4nγ）127Xe聚变蒸发反应填充激发态。已经确定了两个新的负宇称带，并使用三轴投影壳模型（TPSM）方法讨论了它们的结构。其中一个谱带是在3702keV的Iπ=27/2-态以上建立的，根据实验推断和TPSM结果，该谱带被解释为建立在三个准中子配置上的γ谱带。第二个序列在4848keV的Iπ=31/2态以上发现，考虑到该带与相邻同位素的性质，被认为具有两个质子排列的构型（Γh11/2⊗πh11/2 2）。对TPSM波函数的分析证实了对该波段的拟议解释。

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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.