体积样品中的Pb-210：自衰减和散射问题

IF 1.8 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2025-09-04 DOI:10.1016/j.apradiso.2025.112165

Octavian Sima , Daniela Gurau

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引用次数: 0

摘要

在本工作中，我们研究了光源矩阵对低能量光子的光谱和全能量峰值效率的影响。利用PENELOPE 2018进行的真实模拟，包括探测器分辨率，我们发现小角度康普顿散射确实有助于峰值计数率，这意味着矩阵效应与线性衰减系数μ和散射截面有关。我们证明了康普顿散射的影响可以从表观峰中去除，产生一个“干净”的峰，仅依赖于μ。我们在非准直传输测量的基础上应用该方法计算μ，然后用它来计算自衰减校正。我们在相互比较的背景下分析了在IFIN-HH中进行的测量。

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Pb-210 in volume samples: self-attenuation and scattering problems

In this work we study the effect of the matrix of the source on the spectrum and on the full energy peak efficiency for low energy photons. Using realistic simulations carried out with PENELOPE 2018, including detector resolution, we show that small angle Compton scattering does contribute to the peak count rate, implying the dependence of the matrix effects on the linear attenuation coefficient μ and also on the scattering cross section. We show that the effect of Compton scattering can be removed from the apparent peak, resulting a “clean” peak depending only on μ. We apply the procedure for the evaluation of μ on the basis of uncollimated transmission measurements and subsequently use it for the calculation of self-attenuation corrections. We analyze measurements carried out in IFIN-HH in the context of an intercomparison exercise.

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.