气体裂变产物<sup>87</sup>Kr半衰期测定

气体裂变产物⁸⁷Kr半衰期测定

摘要: ⁸⁷Kr是核燃料裂变燃耗测定中重要的气体裂变产物。为准确测定核燃料的裂变燃耗，要求⁸⁷Kr半衰期具有很高的准确度。本工作用单个HPGe探测器连续跟踪和双HPGe探测器位置接续法测定⁸⁷Kr的半衰期。⁸⁷Kr半衰期的测定结果为（76.33±0.07） min。

Abstract: As an important gaseous fission product to determine the burn-up of nuclear fuel, the half-life of ⁸⁷Kr must be accurate for determing the burn-up accurately. The continuous trace method by single HPGe detector and position relay method by two high purity germanium detectors were used for determine the half-life of ⁸⁷Kr. The determined value,T_1/2(⁸⁷Kr) is （76.33±0.07） min.