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    N=50 core excitation in Mo534295 at high angular momentum

    W. Q. Yang (杨伟庆)1,2, C. B. Li (李聪博)1,2,*, 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, R. Hong (洪锐)1,3, S. X. Guan (关少雄)1, 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, 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, F. L. Liu (刘伏龙)1, S. Wang (王硕)8,9, D. P. Sun (孙大鹏)8,9, and L. H. Zhu (竺礼华)10

    • 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
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    Phys. Rev. C 113, 014303 – Published 5 January, 2026

    DOI: https://doi.org/10.1103/pwq5-m92n

    Abstract

    The excited states of Mo95 have been investigated using the heavy-ion fusion-evaporation reaction Se82(O18,5n)Mo95 at the beam energies of 82 and 88 MeV. The level scheme of Mo95 was revised and extended up to E≈14MeV and Iπ=55/2(−) with 62 new γ-ray transitions and 30 new levels. The energy spectrum bears the signature of core breaking viz. presence of high energy γ transitions with Eγ≃2to3MeV around the highest observed excitation energy and angular momentum originating due to excitation of nucleons across the N=50 core. The proposed level scheme is compared with large basis spherical shell model calculations within a model space including the proton orbitals (1f5/2, 2p3/2, 2p1/2, 1g9/2) and neutron orbits (1g9/2, 1g7/2, 2d5/2, 2d3/2, 3s1/2). Satisfactory agreement between the experimental observation and shell-model calculations suggests that cross-shell excitations are important up to the maximum spin observed in the current experiment.

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    Phys. Rev. C 113, 014303– Published 5 January, 2026
    • Received 1 September 2025
    • Accepted 3 December 2025
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