Preliminary design and performance analysis of a wide-energy-spectrum CR-39 individual neutron dosimeter
10.13491/j.issn.1004-714X.2025.06.008
- VernacularTitle:宽能谱CR-39中子个人剂量计的初步设计及性能分析
- Author:
Jian XU
1
;
Yanqiu DING
2
;
Wen GUO
2
;
Yunyun WU
2
;
Pin GAO
2
;
Kaiyi WANG
2
Author Information
1. Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China;Lianyungang City Ganyu District Center for Disease Control and Prevention, Lianyungang 222100, China.
2. Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China.
- Publication Type:OriginalArticles
- Keywords:
Wide energy spectrum;
CR-39;
Neutron;
Dosimeter;
Converter
- From:
Chinese Journal of Radiological Health
2025;34(6):830-836
- CountryChina
- Language:Chinese
-
Abstract:
Objective To preliminarily design a wide-energy-spectrum CR-39 solid-state nuclear track individual neutron dosimeter with different energy sections. Methods The thickness of the converter was optimized using the Monte Carlo SRIM program to broaden the energy range of the dosimeter. The self-made wide-energy-spectrum CR-39 individual neutron dosimeter was calibrated using 241Am-Be, 252Cf, and thermal neutron sources to evaluate its dosimetric performance, including linearity, energy response, and neutron energy resolution. Results The linear correlation coefficient of the measurement system exceeded 0.98. The relative deviations of the energy response were 35.0% for blank section and 42.0% for polyethylene section, falling within the range of −50% to + 100% and meeting the monitoring requirements. The detection sensitivity for thermal neutron dose was 67 137.2 tr·cm−2·mSv−1, and the detection sensitivity for thermal neutron fluence was 0.98 × 10−3 tr·n−1, demonstrating good thermal neutron detection capability. Conclusion The self-made wide-energy-spectrum CR-39 individual neutron dosimeter fundamentally meets the requirements for individual neutron dose monitoring and is suitable for individual neutron dose monitoring in the energy range of thermal neutrons (up to approximately 15 MeV).
