$\mathbf{\mathrm{^{205}{Tl}^{81+}}}$ 离子的束缚态β衰变与LOREX项目
核实验
2025-01-13 v1 太阳与恒星天体物理
仪器与探测器
摘要
稳定 Tl 离子具有已知最低的电子中微子()捕获能量阈值 keV。20世纪80年代提出的洛兰石实验(LOREX)旨在利用天然含铊洛兰石矿石沉积物获取长期平均太阳中微子通量。为确定 捕获截面，需要知道连接 Tl 基态和 Pb 中2.3 keV第一激发态的弱跃迁强度。实验上研究该跃迁的唯一方法是测量完全电离的 离子的束缚态β衰变()。经过三十年的精心准备，在达姆施塔特GSI的实验存储环(ESR)上测得 的 衰变半衰期为 天。与理论估计相比，测得的半衰期更长，这降低了LOREX中预期的信噪比，从而对其可行性提出了挑战。
引用
@article{arxiv.2501.06029,
title = {Bound-State Beta Decay of $\mathbf{\mathrm{^{205}{Tl}^{81+}}}$ Ions and the LOREX Project},
author = {R. S. Sidhu and G. Leckenby and R. J. Chen and R. Mancino and Yu. A. Litvinov and G. Martínez-Pinedo and G. Amthauer and M. Bai and K. Blaum and B. Boev and F. Bosch and C. Brandau and V. Cvetković and T. Dickel and I. Dillmann and D. Dmytriiev and T. Faestermann and O. Forstner and B. Franczak and H. Geissel and R. Gernhäuser and J. Glorius and C. Griffin and A. Gumberidze and E. Haettner and P. -M. Hillenbrand and P. Kienle and W. Korten and Ch. Kozhuharov and N. Kuzminchuk and K. Langanke and S. Litvinov and E. Menz and T. Morgenroth and T. Neff and C. Nociforo and F. Nolden and M. K. Pavícević and N. Petridis and U. Popp and S. Purushothaman and R. Reifarth and M. S. Sanjari and C. Scheidenberger and U. Spillmann and M. Steck and Th. Stöhlker and Y. K. Tanaka and M. Trassinelli and S. Trotsenko and L. Varga and M. Wang and H. Weick and P. J. Woods and T. Yamaguchi and Y. H. Zhang and J. Zhao and K. Zuber},
journal= {arXiv preprint arXiv:2501.06029},
year = {2025}
}