气体裂变产物88Kr半衰期测量

为准确测定气体裂变产物⁸⁸Kr的半衰期，本工作从辐照铀靶中分离得到3个放化纯的⁸⁸Kr气体测量源。以⁸⁵Kr作内标监督源，¹³⁷Cs或⁵⁷Co作外标监督源，使用多个HPGe探测器分别采用单探测器位置接力法和双探测器位置接力法跟踪测量⁸⁸Kr 196.3 keV能量的特征γ射线，跟踪时间均在8个半衰期以上，以获得其半衰期数据。对3次独立测量数据用多种方法进行处理，最终得到⁸⁸Kr半衰期测定结果为（2.796±0.015） h。

Half-life Determination of Gaseous Fission Product 88Kr

To determine the half-life of gaseous fission product ⁸⁸Kr accurately, three purified ⁸⁸Kr sources were prepared from irradiated uranium targets by using a radiochemical separation process. With ⁸⁵Kr as the internal monitor, ¹³⁷Cs/⁵⁷Co as the external label sources, both single detector position relay method and double detectors position relay method were applied to track the characteristic 196.3 keV gamma rays by multiple high purity germanium detectors covering more than eight times half-lives. The results from three separate determinations were discussed, and a half-life of (2.796±0.015) h for ⁸⁸Kr was presented.