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arXiv 1207.4601physics.ins-detnucl-ex
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大体积样品γ能谱测量中探测器效率的测定

Determination of the efficiency of a detector in gamma spectrometry of large-volume samples

E. G. Tertyshnik, A. T. Korsakov

摘要:

提出了一种测量大体积样品时确定探测器全能峰效率ε(E)的实验-计算方法。水被用作标准吸收体,其中光子的线性衰减系数μ0(E)是公知的。样品材料(样品基质)中的μ(E)值是用分光计实验测定的。给出了计算比值ε(E)/ ε0(E)的公式,其中ε0(E)是探测器对充满水的容器中产生的光子的FEPE(通过在参考放射性溶液的容器中添加得到)。为了证明该方法的有效性,使用乙醇(密度0.8 g/cm 3)和盐水溶液(密度1.2和1.5 g/cm 3)模拟具有不同衰减系数的样品。实验和计算效率之间的标准偏差约为5%。

英文摘要:

The experimental - calculated method is proposed to determine the full energy peak efficiency (FEPE) of detectors ε(E) in case a measurement of the large-volume samples. Water is used as standard absorber in which the linear attenuation coefficients for photons μ0 (E) is well known. The value μ (E) in sample material (matrix of the sample) is determined experimentally by means of spectrometer. The formulas are given for calculation of the ratio ε(E)/ ε0(E), where ε0(E) is FEPE of the detector for photons those are arising in the container filled with water (it is found by adding in the container of the Reference radioactive solutions). To prove the validity of the method ethanol (density 0,8 g/cm3) and water solutions of salts (density 1,2 and 1,5 g/cm3) were used for simulation of the samples with different attenuation coefficients. Standard deviation between experimental and calculated efficiencies has been about 5 %.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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