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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Monte Carlo simulation of the self-absorption corrections for natural samples in gamma-ray spectrometry.
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Monte Carlo simulation of the self-absorption corrections for natural samples in gamma-ray spectrometry.

机译：在自然伽马射线光谱法中对自然样品的自吸收校正的蒙特卡罗模拟。

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摘要

Gamma-ray self-attenuation corrections in the energy range 60-2000keV were evaluated by means of Monte Carlo calculations for environmental samples in a cylindrical measuring geometry. The dependence of the full-energy peak efficiency on the sample density was obtained for some particular photon energies and, as a result, the corresponding self-attenuation correction factors were obtained. The calculations were performed by assuming that natural materials have mass attenuation coefficients very similar to those of water in the energy range studied. Three different HpGe coaxial detectors were considered: an n-type detector with 44.3% relative efficiency and two p-type detectors of relative efficiencies 20.0% and 30.5%. Our calculations were in very good agreement with the self-attenuation correction factors obtained experimentally by other workers for environmental samples of different densities. This work demonstrates the reliability of Monte Carlo calculations for correcting photon self-attenuation innatural samples. The results also show that the corresponding correction factors are essentially unaffected by the specific coaxial detector used.
机译：通过蒙特卡罗计算对圆柱形测量几何形状中的环境样品评估了60-2000keV能量范围内的伽马射线自衰减校正。对于某些特定的光子能量，获得了全能量峰值效率对样品密度的依赖关系，因此，获得了相应的自衰减校正因子。假设天然材料的质量衰减系数与研究能量范围内的水非常相似，则可以进行计算。考虑了三种不同的HpGe同轴探测器：相对效率为44.3％的n型探测器和相对效率为20.0％和30.5％的两个p型探测器。我们的计算与其他工人针对不同密度的环境样品实验获得的自衰减校正因子非常吻合。这项工作证明了蒙特卡洛计算用于校正自然样本中光子自衰减的可靠性。结果还表明，相应的校正因子基本上不受所使用的特定同轴检测器的影响。

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