论文标题
$^6 $ He Half Life的高精度测量
High precision measurement of the $^6$He half-life
论文作者
论文摘要
$^{6} $的半衰期是使用植入YAP闪烁体中的低能放射光束测量的，并记录了4 $π$几何形状的衰减事件。通过数字数据采集系统对事件进行时间戳记，从而可以可靠地控制死时间效应和检测器增益变化。结果是$ t_ {1/2} =（807.25 \ pm 0.16 _ {\ rm Stat} \ pm 0.11 _ {\ rm sys} $）〜ms，提供了到目前为止获得的最精确值，并且与唯一的先前测量值保持一致，该测量唯一的测量值小于0.1％。这解决了两组测量之间以前观察到的长期差异。
The half-life of $^{6}$He has been measured using a low energy radioactive beam implanted in a YAP scintillator and recording decay events in a 4$π$ geometry. Events were time-stamped with a digital data acquisition system enabling a reliable control of dead-time effects and detector gain variations. The result, $T_{1/2} = (807.25 \pm 0.16_{\rm stat} \pm 0.11_{\rm sys}$)~ms, provides the most precise value obtained so far and is consistent with the only previous measurement having a precision smaller than 0.1%. This resolves the longstanding discrepancy previously observed between two sets of measurements.
