摘要
介绍了 1 2 2 0 Quantulus液闪谱仪测量 3 H计数效率的刻度方法。实验结果表明 ,用商用猝灭校正源来刻度仪器计数效率 ,首先应检验对实际被测样品的适用性 ,否则会使样品测量值有较大误差 ;对于一般的 3 H常规监测 ,样品制备程序相同 ,猝灭情况变化不大 ,猝灭系数 SQP( E)在 71 1～ 732之间波动 ,因而可以用被测样品的空白材料无氚水作为猝灭剂来配制猝灭系列源 ,并用它制作的校正曲线来刻度仪器计数效率 。
This paper described the method of calibrating 1220 Quantulus Liquid Scintillation spectrometer for tritium counting efficiency. The results show that the commercially available quenching correction standard source is used for calibration purpose, its adaptability to the samples to be measured should be checked at the first. Otherwise, there will be larger error in the measuring results of samples. For the routine measurement of tritium, the same preparation procedures can be used, with quenching efficient SQP(E) within the range of 711 to 732. Thus, quenching correction source series can be prepared with tritium-free water as quenching materials. On this basis, the quenching correction curve is obtained to calibrate the instrument's counting efficiency.
出处
《辐射防护通讯》
2002年第3期15-18,共4页
Radiation Protection Bulletin
