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同位素稀释质谱法测定裂变产物钐的绝对量时,国外通常用浓缩钐作为稀释剂。本报告介绍了以高纯的天然钐作稀释剂,用 MAT CH_5 质谱计测定了动力堆卸料元件中裂变产物~(149)Sm 的含量,并把它换算成每克铀燃料溶液中累积裂变产额~(149)Sm 绝对量,与理论计算符合。相对标准偏差为±1.6%(置信度95%),本报告对稀释剂选择,污染等问题作了认真的探讨。为评价物理计算提供了实验数据。
Isotope dilution mass spectrometry to determine the absolute amount of fission product samarium, the concentration of samarium abroad is usually used as a diluent. This report describes the determination of the ~ (149) Sm content of fission products in a power reactor discharge unit using MAT CH 5 mass spectrometer, using high purity natural samarium as a diluent and converting it to cumulative fission per gram of uranium fuel solution The yield ~ (149) Sm absolute quantity, in line with the theoretical calculation. The relative standard deviation was ± 1.6% (confidence 95%). This report examines issues such as diluent selection and contamination. Experimental data provided for the evaluation of physical calculations.