Fan D, Zhuo W, Chen B, Zhao C, Yi Y, Zhang Y
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China.
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China
Radiat Prot Dosimetry. 2015 Nov;167(1-3):121-5. doi: 10.1093/rpd/ncv227. Epub 2015 Apr 27.
In this study, based on the electrostatic integrating radon monitor (EIRM) developed by Iida et al., a new type of EIRM with the allyl glycol carbonate (CR-39) as alpha-particle detector was developed for outdoor radon measurements. Besides using the CR-39 to replace the cellulose nitrate film as alpha-particle detector, the electrode and the setting place of the CR-39 were also optimally designed based on the simulation results of the electric field and the detection efficiency. The calibration factor of the new EIRM was estimated to be 0.136±0.002 tracks cm(-2) (Bq m(-3) h)(-1), with the lower detection limit of 0.6 Bq m(-3) for a 2-month exposure. Furthermore, both the battery and the dry agent were also replaced to protect the environment. The results of intercomparison and field experiments showed that the performances of the new EIRM were much better than the original one. It suggests that the new type of ERIM is more suitable for large-scale and long-term outdoor radon surveys.
在本研究中，基于饭田等人开发的静电积分氡监测仪（EIRM），开发了一种新型的以碳酸烯丙基二醇酯（CR-39）作为α粒子探测器的EIRM，用于室外氡测量。除了使用CR-39代替硝酸纤维素膜作为α粒子探测器外，还根据电场和探测效率的模拟结果对CR-39的电极和放置位置进行了优化设计。新型EIRM的校准因子估计为0.136±0.002径迹·厘米⁻²（贝克勒尔·立方米⁻³·小时）⁻¹，2个月暴露的探测下限为0.6贝克勒尔·立方米⁻³。此外，还更换了电池和干燥剂以保护环境。比对和现场实验结果表明，新型EIRM的性能比原来的要好得多。这表明新型ERIM更适合大规模和长期的室外氡调查。
