基于MCPT解法器库的专用辐射探测模拟软件研发与应用

朱剑钰; 黄孟; 彭玄; 拓飞; 李刚

doi:10.11884/HPLPB202234.210327

基于MCPT解法器库的专用辐射探测模拟软件研发与应用

doi: 10.11884/HPLPB202234.210327

朱剑钰^1,,
黄孟^1, ,,
彭玄²,
拓飞²,
李刚³

1.
中国工程物理研究院战略研究中心, 北京 100088
2.
中国疾病预防控制中心辐射防护与核安全医学所, 北京 100088
3.
北京应用物理与计算数学研究所, 北京 100088

基金项目: 中国疾病预防控制中心辐射防护与核安全医学所财政项目

详细信息

作者简介:
朱剑钰，zhujyu@126.com

通讯作者:
黄　孟，hm.max@126.com

中图分类号: O571.53
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- 文章访问数: 598
- HTML全文浏览量: 174
- PDF下载量: 23
- 被引次数: 0
出版历程
- 收稿日期: 2021-07-28
- 修回日期: 2021-12-31
- 网络出版日期: 2022-01-10
- 刊出日期: 2022-01-11

Development and application of simulation code for radiation detection based on MCPT solver library

Zhu Jianyu^1
,,
Huang Meng^{1
, ,},
Peng Xuan²,
Tuo Fei²,
Li Gang³

1.
Center for Strategic Studies, CAEP, Beijing 100088, China
2.
National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China
3.
Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

摘要

摘要: 甲状腺内¹³¹I放射性活度与辐射探测结果的比例关系与甲状腺几何尺寸、探测距离等因素相关，是估算甲状腺内¹³¹I含量与其可能造成的辐照损伤的关键参数。基于MCPT辐射输运数值模拟算法器库开发了用于开展NaI探测器伽马辐射测量模拟的应用程序，进而建立了多组具有不同容积的甲状腺型容器和不同探测距离的物理模型，最终通过蒙特卡罗数值计算得到了不同测量状态下探测器的探测效率。在甲状腺型容器与探测器距离较远时，数值模拟给出的结果与理论计算结果一致，证明此应用程序可用于定量分析NaI的探测效率。数值模拟结果表明，小距离模型的结果受甲状腺样容器的大小和距离的显著影响，模拟给出的探测效率表为开展深入细致的实验研究奠定了基础。
- 辐射输运 /
- MCPT解法器库 /
- 甲状腺 /
- 辐射剂量测量 /
- I-131
Abstract: The relationship between ¹³¹I activity in the thyroid and radiation detection results is related to the thyroid geometry, detection distance and other factors, which is a key parameter for estimating the ¹³¹I content in the thyroid and its possible irradiation damage. We developed an application for gamma radiation measurement simulation of NaI detectors based on the MCPT radiation transport numerical simulation algorithm library. Then several physical models with different volumes of thyroid containers and different detection distances were established. Finally, the detection efficiency of detectors were obtained under different measurement states by Monte Carlo numerical calculations. The results of the numerical simulation are consistent with that of the theoretical calculation when the distance between the thyroid-like container and the detector is large, which proves that the application could be used to quantitatively analyze the detection efficiency of NaI detectors. It is indicated that the detection efficiency for the detector with small distances is significantly influenced by the size of the thyroid-like container and the distance. The detection efficiency table given by the simulations provides a basis for an in-depth experimental study.
- radiation transport /
- MCPT solver library /
- thyroid /
- radiation dose measurement /
- I-131

HTML全文

图 1 中子输运随机模拟流程

Figure 1. Neutron transport simulation procedure

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图 2 探测信号统计流程框图

Figure 2. Framework of detection signal processing

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图 3 容积为3.5 mL甲状腺形状容器的探测系统模型

Figure 3. Detection system of 3.5 mL thyroid type container

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图 4 典型甲状腺形状容器结构模型

Figure 4. Typical models of thyroid type container

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图 5 典型探测系统模型

Figure 5. Typical models of detection systems

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图 6 探测效率随探测距离变化关系

Figure 6. Relationship between detection efficiency and detection distance

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图 7 归一化探测效率随甲状腺模型容积变化关系

Figure 7. Relationship between normalized detection efficiency and the volume of thyroid type container

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表 1 探测系统主要材料成分

Table 1. Compositions of the main material in detection system

material	main composition and density of nucleon number/ (10²⁴ cm⁻³)
solution	Na: 6.305 68E-005	O: 0.035	H: 0.0700643
container	C: 0.0144453	O: 0.0361133	H: 0.0577813
detector	Na: 0.00983491	I: 0.00983491	Al: 0.0602616

下载: 导出CSV

表 2 计算采用的甲状腺型容器相关参数

Table 2. Parameters of thyroid type container used in calculation

V/mL	diameter of neck/mm	long axis of ellipsoid/mm	thickness of rectangle/mm	height of rectangle/mm	long axis of cylinder/mm	average distance of radiation transmission/mm
0.65	47.39	13.46	1.62	4.85	1.88	12.35
1.00	54.71	15.54	1.87	5.60	2.18	14.26
2.00	68.93	19.58	2.35	7.05	2.74	17.97
3.00	78.90	22.35	2.69	8.07	3.14	20.57
4.00	86.84	24.67	2.96	8.88	3.45	22.64
5.00	93.55	26.65	3.19	9.57	3.72	24.39
6.00	99.41	28.42	3.39	10.17	3.95	25.91
7.00	104.65	29.75	3.57	10.70	4.16	27.28
8.00	109.41	30.90	4.02	12.05	4.35	28.52
9.00	113.80	32.25	4.02	12.05	4.53	29.66
10.00	117.86	33.50	4.02	12.05	4.69	30.72

下载: 导出CSV

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