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Consistency checks of results from a Monte Carlo code intercomparison for emitted electron spectra and energy deposition around a single gold nanoparticle irradiated by X-rays
Radiation Measurements ( IF 2 ) Pub Date : 2021-07-30 , DOI: 10.1016/j.radmeas.2021.106637
H Rabus 1, 2 , W B Li 2, 3 , H Nettelbeck 1, 2 , J Schuemann 2, 4 , C Villagrasa 2, 5 , M Beuve 2, 6 , S Di Maria 2, 7 , B Heide 2, 8 , A P Klapproth 3, 9 , F Poignant 6, 10 , R Qiu 2, 11 , B Rudek 4, 12
Affiliation  

Organized by the European Radiation Dosimetry Group (EURADOS), a Monte Carlo code intercomparison exercise was conducted where participants simulated the emitted electron spectra and energy deposition around a single gold nanoparticle (GNP) irradiated by X-rays. In the exercise, the participants scored energy imparted in concentric spherical shells around a spherical volume filled with gold or water as well as the spectral distribution of electrons leaving the GNP. Initially, only the ratio of energy deposition with and without GNP was to be reported. During the evaluation of the exercise, however, the data for energy deposition in the presence and absence of the GNP were also requested. A GNP size of 50 nm and 100 nm diameter was considered as well as two different X-ray spectra (50 kVp and 100 kVp). This introduced a redundancy that can be used to cross-validate the internal consistency of the simulation results. In this work, evaluation of the reported results is presented in terms of integral quantities that can be benchmarked against values obtained from physical properties of the radiation spectra and materials involved. The impact of different interaction cross-section datasets and their implementation in the different Monte Carlo codes is also discussed.



中文翻译:

对受 X 射线照射的单个金纳米粒子周围的发射电子能谱和能量沉积的蒙特卡洛代码比对结果进行一致性检查

由欧洲辐射剂量测定组 (EURADOS) 组织的蒙特卡罗代码比对练习中,参与者模拟了受 X 射线照射的单个金纳米颗粒 (GNP) 周围的发射电子能谱和能量沉积。在练习中,参与者对填充有金或水的球形体积周围的同心球壳中传递的能量以及离开 GNP 的电子的光谱分布进行了评分。最初,仅报告有和没有国民生产总值的能量沉积比率。然而,在评估演习期间,还要求提供有和没有 GNP 时的能量沉积数据。考虑了直径为 50 nm 和 100 nm 的 GNP 尺寸以及两种不同的 X 射线光谱(50 kVp 和 100 kVp)。这引入了冗余,可用于交叉验证模拟结果的内部一致性。在这项工作中,对报告结果的评估是以积分的形式呈现的,这些积分可以根据从辐射光谱和所涉及材料的物理特性获得的值进行基准测试。还讨论了不同交互横截面数据集的影响及其在不同蒙特卡罗代码中的实现。

更新日期:2021-08-04
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