通过对$^{229}$ Th中其他核激发态的half-life测量来估计$^{229m}$ Th的辐射half-life
Estimation of radiative half-life of $^{229m}$Th by half-life measurement of other nuclear excited states in $^{229}$Th
摘要：
我们进行符合测量之间的$α$粒子和$γ$射线从$^{233}$ U源，以确定在$^{229}$ Th核的激发态的半衰期。我们首先证明了42.43-和164.53-keV态的半衰期与文献值一致，而97.14-keV态的半衰期（93（7）ps）偏离了先前测量的值（147（12）ps）。首次测定了71.83和163.25 keV态的半衰期。根据所得到的半衰期和Alaga规则，我们估计了低能同分异构态（$^{229m}$ Th）的辐射半衰期为$5.0(11)\times10^{3}$ s，这是基于$^{229}$ Th的频标的关键参数之一。
英文摘要：
We perform coincidence measurements between $α$ particles and $γ$ rays from a $^{233}$U source to determine the half-lives of the excited state in a $^{229}$Th nucleus. We first prove that the half-lives of 42.43- and 164.53-keV states are consistent with literature values, whereas that of the 97.14-keV state (93(7) ps) deviates from a previously measured value (147(12) ps). The half-lives of 71.83- and 163.25-keV states are determined for the first time. Based on the obtained half-lives and the Alaga rule, we estimate the radiative half-life of the low-energy isomeric state ($^{229m}$Th) to be $5.0(11)\times10^{3}$ s, which is one of the key parameters for the frequency standard based on $^{229}$Th.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
