核$\beta$衰变的断层$\beta$-$\gamma$光谱
核实验
2025-12-02 v2 高能物理 - 实验
摘要
核衰变作为核结构和弱相互作用的灵敏探针，正因最新进展的光谱技术而成为标准模型之外物理的精密测试基地。本文介绍了核-断层光谱(TBGS)技术，这是一种检测、以及内部转化电子能量的同时重建能量沉积顶点的技术。使用作为TBGS的PandaX-4T探测器，我们获得了对 Pb 的精确且无偏的衰变方案，后者是深空探测和马约拉纳中子反演搜索中的关键背景同位素。首次同时测量了 Pb 到 Bi 的基态和激发态的衰变，揭示了相对于先前评估的分支比率差异可达 。结合最先进的理论光谱形状计算，这些结果为稀有事件搜索中的背景建模树立了新基准，并凸显了TBGS作为基本物理和核应用的多功能工具的潜力。
引用
@article{arxiv.2510.24612,
title = {Tomographic beta-gamma spectroscopy of nuclear beta decay},
author = {PandaX Collaboration and Zhe Yuan and Zihao Bo and Wei Chen and Xun Chen and Yunhua Chen and Chen Cheng and Xiangyi Cui and Manna Deng and Yingjie Fan and Deqing Fang and Xuanye Fu and Zhixing Gao and Yujie Ge and Lisheng Geng and Karl Giboni and Xunan Guo and Xuyuan Guo and Zichao Guo and Chencheng Han and Ke Han and Changda He and Jinrong He and Houqi Huang and Junting Huang and Yule Huang and Ruquan Hou and Xiangdong Ji and Yonglin Ju and Xiaorun Lan and Chenxiang Li and Jiafu Li and Mingchuan Li and Peiyuan Li and Shuaijie Li and Tao Li and Yangdong Li and Zhiyuan Li and Qing Lin and Jianglai Liu and Yuanchun Liu and Congcong Lu and Xiaoying Lu and Lingyin Luo and Yunyang Luo and Yugang Ma and Yajun Mao and Yue Meng and Binyu Pang and Ningchun Qi and Zhicheng Qian and Xiangxiang Ren and Dong Shan and Xiaofeng Shang and Xiyuan Shao and Guofang Shen and Manbin Shen and Wenliang Sun and Xuyan Sun and Yi Tao and Yueqiang Tian and Yuxin Tian and Anqing Wang and Guanbo Wang and Hao Wang and Haoyu Wang and Jiamin Wang and Lei Wang and Meng Wang and Qiuhong Wang and Shaobo Wang and Shibo Wang and Siguang Wang and Wei Wang and Xu Wang and Zhou Wang and Yuehuan Wei and Weihao Wu and Yuan Wu and Mengjiao Xiao and Xiang Xiao and Kaizhi Xiong and Jianqin Xu and Yifan Xu and Shunyu Yao and Binbin Yan and Xiyu Yan and Yong Yang and Peihua Ye and Chunxu Yu and Ying Yuan and Youhui Yun and Xinning Zeng and Minzhen Zhang and Peng Zhang and Shibo Zhang and Siyuan Zhang and Shu Zhang and Tao Zhang and Wei Zhang and Yang Zhang and Yingxin Zhang and Yuanyuan Zhang and Li Zhao and Kangkang Zhao and Jifang Zhou and Jiaxu Zhou and Jiayi Zhou and Ning Zhou and Xiaopeng Zhou and Zhizhen Zhou and Chenhui Zhu and Marlom Ramalho and Jouni Suhonen},
journal= {arXiv preprint arXiv:2510.24612},
year = {2025}
}