固态基质中$^{229}$Th核同质异能跃迁的激光激发
原子物理
2024-04-19 v1 核实验
摘要
掺杂有Th的LiSrAlF晶体被用于基于激光的核同质异能跃迁搜索。观察到核跃迁能量附近的两个光谱特征。第一个是宽激发特征,产生红移荧光,以几秒的时间尺度衰减。第二个是窄的、受激光线宽限制的光谱特征,位于148.38219(4)_{\textrm{stat}}(20)_{\textrm{sys}} nm (2020407.3(5)_{\textrm{stat}}(30)_{\textrm{sys}} GHz),以568(13)_{\textrm{stat}}(20)_{\textrm{sys}} s的寿命衰减。该特征被归因于Th核同质异能态的激发,在Th:LiSrAlF中其能量为8.355733(2)_{\textrm{stat}}(10)_{\textrm{sys}} eV。
引用
@article{arxiv.2404.12311,
title = {Laser excitation of the $^{229}$Th nuclear isomeric transition in a solid-state host},
author = {R. Elwell and Christian Schneider and Justin Jeet and J. E. S. Terhune and H. W. T. Morgan and A. N. Alexandrova and H. B. Tran Tan and Andrei Derevianko and Eric R. Hudson},
journal= {arXiv preprint arXiv:2404.12311},
year = {2024}
}
备注
Submitted to Physical Review Letters on March 25, 2024