使用Cs $_2$ HfCl $_6$闪烁体搜索天然存在的Hf核素的$α$衰变
Search for $α$ decay of naturally occurring Hf-nuclides using a Cs$_2$HfCl$_6$ scintillator
摘要：
在意大利INFN的Gran Sasso国家实验室的低本底装置中测量了氯化铯铪（Cs $_2$ HfCl $_6$）晶体闪烁体的残留放射性污染物。探测器的总α放射性水平为7.8（3）mBq/kg。直接研究的$α$衰变的天然存在的铪同位素，已使用“源=检测器”的方法的结果。在2848小时的数据采集中，使用T $_{1/2} = (7.0\pm1.2)\times10^{16} $ y观察到$^{174}$ Hf的$α$衰变。
英文摘要：
Residual radioactive contaminants of a caesium hafnium chloride (Cs$_2$HfCl$_6$) crystal scintillator have been measured in a low background setup at the Gran Sasso National Laboratory of the INFN, Italy. The total alpha activity of the detector is at the level of 7.8(3) mBq/kg. The results of direct studies of the $α$ decay of naturally occurring Hf isotopes that have been performed using the "source=detector" approach are presented. In 2848 h of data taking, the $α$ decay of $^{174}$Hf was observed with T$_{1/2} = (7.0\pm1.2)\times10^{16} $ y.
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