Determination of self-attenuation correction factors for [formula omitted] NaI(Tl) detector by using Monte Carlo Code FLUKA

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2025-01-27 DOI:10.1016/j.radphyschem.2025.112560

Hakan Çetinkaya

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引用次数: 0

Abstract

NaI(Tl) gamma spectroscopy systems are widely used to determine the radioactivity level of the environmental samples. It is important to calculate the correct activity of environmental samples with respect to the calibration source. An activity correction is required when the density or absorption coefficient of the calibration source and the environmental sample is different; this is called the self-attenuation correction factor. In this study, the 3′′×3′′ NaI(Tl) gamma spectroscopy system in our laboratory was modeled using the Monte Carlo code FLUKA. Simulation results were validated by comparing the experimental and simulation FWHM results both for disk sources alone and disk sources placed above the 1 L Marinelli beakers. Self-attenuation correction factors were calculated for 0.5 and 1 L Marinelli beakers in the 238.6-2614 keV energy range using the FLUKA code. The materials in Marinelli beakers are assumed to be air, water and SiO2 in FLUKA simulations, the densities of these materials range from 0 to 2.8 g/cm3. Additionally, energy and material density dependent coefficients of the analytical self-attenuation correction factor equation for 0.5 and 1 L Marinelli beakers were also derived using the FLUKA results.

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. 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. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.