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    Nuclear structure investigation of the near-spherical nucleus Nb95

    R. Hong (洪锐)1,2,3, C. B. Li (李聪博)1,2,*, H. D. Li (李会东)3,†, Y. Zheng (郑云)1,2,‡, T. X. Li (李天晓)1, X. G. Wu (吴晓光)1, Y. Q. Li (李韵秋)1,2, S. X. Guan (关少雄)1,2, H. Y. Wu (吴鸿毅)2,4 et al.

    M. Zheng (郑敏)1, Z. H. Zhao (赵子豪)1,5, Z. Y. He (贺子阳)1, J. Z. Li (李金泽)1, J. Shi (施婧)1, J. N. Zou (邹佳楠)1, L. W. Yang (杨立旺)1,6, Y. D. Fang (方永得)7, J. H. Xu (徐君宏)7, J. H. Li (黎健宏)7, Z. H. Jia (贾子豪)7, C. X. Jia (贾晨旭)7, W. Q. Zhang (张文强)7, J. L. Wang (汪金龙)1, C. Y. Guo (郭成宇)4, Z. X. Zhou (周振翔)4, L. Ni (倪磊)4, G. S. Li (李广顺)7, B. Guo (郭冰)1, S. Y. Wang (王守宇)8,9, M. L. Liu (柳敏良)7, C. Y. He (贺创业)1, S. Wang (王硕)8,9, D. P. Sun (孙大鹏)8,9, L. H. Zhu (竺礼华)10, and D. F. Chen (陈东风)1,2

    • 1Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, People's Republic of China
    • 2Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, People's Republic of China
    • 3Department of Science, Xihua University, Chengdu 610039, People's Republic of China
    • 4School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
    • 5Department of Physics, Jilin University, Changchun 130023, People's Republic of China
    • 6School of Sciences Henan University of Technology, Zhengzhou 450001, People's Republic of China
    • 7Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
    • 8Shandong Provincial Key Laboratory of Nuclear Science, Nuclear Energy Technology and Comprehensive Utilization, Weihai Frontier Innovation Institute of Nuclear Technology, School of Nuclear Science, Energy and Power Engineering, Shandong University, Shandong 250061, People's Republic of China
    • 9WeiHai Research Institute of Industrial Technology of Shandong University, Weihai 264209, People's Republic of China
    • 10Physical and Nuclear Energy and Engineering, Beihang University, Beijing 100191, People's Republic of China

    • *Contact author: licb@ciae.ac.cn
    • †Contact author: huidongli888@163.com
    • ‡Contact author: zhengyun@ciae.ac.cn
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    Phys. Rev. C 114, 014318 – Published 15 July, 2026

    DOI: https://doi.org/10.1103/d87s-gnwn

    Abstract

    The excited states of Nb95 have been investigated using the heavy-ion fusion-evaporation reaction Se82(O18,p4n)Nb95 at the beam energies of 82 and 88 MeV. Particle-γ−γ and γ−γ coincidence measurements using CsI and HPGe arrays are employed to gain selectivity to Nb isotopic products. The level scheme of Nb95 was extended up to E≈12 MeV and Iπ=(53/2−) with 32 new γ-ray transitions. The suggested positive parity sequence of earlier publication is modified to negative parity; a previously unobserved new decay sequence has been assigned as positive parity. The coupling of the odd proton occupying the g9/2 orbital to the levels in the even-even Zr94 core can account for the low-lying excited states of Nb95. The observed experimental states are compared with theoretical shell-model calculations.

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    Phys. Rev. C 114, 014318– Published 15 July, 2026
    • Received 15 March 2026
    • Accepted 16 June 2026
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