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138Cs是测定核燃料裂变燃耗用的重要核素,但其半衰期的文献值差异很大。详细阐述了用阱式HPGe探测器质量接续法和双HPGe探测器位置接续法测定138Cs半衰期的原理和过程,最后测定结果为32.17±0.07min。
138Cs is an important nuclide for the determination of fission fuel burn of nuclear fuel, but the literature value of half-life varies greatly. The principle and process of determining the half-life of 138Cs by the well HPGe detector continuation method and the dual HPGe detector position continuation method are described in detail. The final determination result is 32.17 ± 0.07min.