Tokonami S, Zhuo W, Ryuo H, Yonehara H, Yamada Y, Shimo M
Research Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.
Radiat Prot Dosimetry. 2003;103(1):69-72. doi: 10.1093/oxfordjournals.rpd.a006118.
An instrument performance test has been carried out for a radon measuring system made in Hungary. The system measures radon using the alpha-track detection technique. It consists of three parts: the passive detector, the etching unit and the evaluation unit. A CR-39 detector is used as the radiation detector. Alpha-track reading and data analysis are carried out after chemical etching. The following subjects were examined in the present study: (1) radon sensitivity, (2) performance of etching and evaluation processes and (3) thoron sensitivity. The radon sensitivity of 6.9 x 10(-4) mm(-2) (Bq m(-3) d)(-1) was acceptable for practical application. The thoron sensitivity was estimated to be as low as 3.3 x 10(-5) mm(-2) (Bq m(-3) d)(-1) from the experimental study.
已对匈牙利制造的氡测量系统进行了仪器性能测试。该系统采用α径迹探测技术测量氡。它由三部分组成：被动探测器、蚀刻单元和评估单元。使用CR - 39探测器作为辐射探测器。化学蚀刻后进行α径迹读取和数据分析。本研究考察了以下几个方面：(1) 氡灵敏度；(2) 蚀刻和评估过程的性能；(3) 钍射气灵敏度。6.9×10(-4) mm(-2) (Bq m(-3) d)(-1) 的氡灵敏度对于实际应用来说是可以接受的。通过实验研究估计钍射气灵敏度低至3.3×10(-5) mm(-2) (Bq m(-3) d)(-1) 。
