A comparative analysis of the NaI detector response function using GAMOS and FLUKA Monte Carlo simulations

Nuclear Analysis Pub Date : 2024-09-23 DOI:10.1016/j.nucana.2024.100138

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Abstract

This work aims to study the response function of a 2″×2″ NaI(Tl) scintillation detector using Monte Carlo simulations. A precise mathematical model of the NaI(Tl) scintillator was developed using both FLUKA and GAMOS Monte Carlo simulation software. The photon pulse height distributions of the NaI(Tl) without influence of its energy resolution, obtained with FLUKA and GAMOS codes, were converted into a real NaI(Tl) response function using the necessary conversion process. Spectral characteristics such as full-energy peak efficiency, energy resolution, peak-to-Compton ratio, and peak-to-total ratio were investigated by simulation at different gamma-ray energy obtained from ¹⁰⁹Cd, ¹³⁷Cs, ⁵⁴Mn, ⁶⁵Zn, and ⁶⁰Co sources. The simulated spectra from the GAMOS code were consistent with those generated by the FLUKA code. Additionally, the comparison between simulated results and experimental data demonstrated good agreement. The validation of the computational models used for the NaI(Tl) detector in both FLUKA and GAMOS software was successfully achieved, confirming the accuracy of the simulations in replicating the detector's response.

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利用 GAMOS 和 FLUKA 蒙特卡罗模拟对碘化钠探测器响应函数进行比较分析

这项工作旨在利用蒙特卡罗模拟研究 2″×2″ NaI（Tl）闪烁探测器的响应函数。利用 FLUKA 和 GAMOS 蒙特卡罗模拟软件建立了 NaI(Tl)闪烁体的精确数学模型。利用 FLUKA 和 GAMOS 代码获得的不受能量分辨率影响的 NaI（Tl）光子脉冲高度分布，通过必要的转换过程转换为真实的 NaI（Tl）响应函数。通过模拟从 109Cd、137Cs、54Mn、65Zn 和 60Co 源获得的不同伽马射线能量，研究了全能峰值效率、能量分辨率、峰值与康普顿比和峰值与总比等光谱特性。GAMOS 代码模拟的光谱与 FLUKA 代码生成的光谱一致。此外，模拟结果与实验数据的比较也显示出良好的一致性。在 FLUKA 和 GAMOS 软件中对 NaI(Tl)探测器所用计算模型的验证已成功实现，证实了模拟在复制探测器响应方面的准确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Analysis

CiteScore

1.70

自引率

0.00%

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