In a nuclear reactor, heat generated by the decay of fission products and radioactive materials is called decay heat or decay power. For measuring decay heat from radioactive samples, bismuth germanate scintillators based whole energy absorption spectrometer was commissioned recently. To standardize it, decay heat from neutron irradiated 197Au foil was measured from 7 min to 480 h. In this cooling period the decay heat reduced from 1668 ± 12.5 to 10 ± 1.8 pW. The measurements were compared with the predictions and the C/E ratios were found to be < 1.10. The fractional decay power contributions from betas and gammas for 198Au were obtained through the measurements and estimations. This work provided experience for planning irradiation and measuring time for further experiments with reactor structural materials and actinides.

中文翻译：

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用全能量吸收光谱仪测量中子辐照197Au箔的衰变热

在核反应堆中，裂变产物和放射性物质衰变产生的热量称为衰变热或衰变功率。为了测量放射性样品的衰变热，最近委托使用了基于锗酸铋闪烁体的全能量吸收光谱仪。为了对其进行标准化，测量了 7 分钟到 480 小时的中子辐照 197Au 箔的衰变热。在这个冷却期间，衰变热从 1668 ± 12.5 pW 减少到 10 ± 1.8 pW。将测量值与预测值进行比较，发现 C/E 比 < 1.10。198Au 的 beta 和 gamma 的部分衰减功率贡献是通过测量和估计获得的。这项工作为计划辐照和测量反应堆结构材料和锕系元素的进一步实验提供了经验。