An improved electrostatic integrating radon monitor with the CR-39 as alpha-particle detector.
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.
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China.
D
D
Fan
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China whzhuo@fudan.edu.cn.
W
W
Zhuo
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China.
B
B
Chen
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China.
C
C
Zhao
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China.
Y
Y
Yi
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China.
Y
Y
Zhang
D000396:Air Pollutants, Radioactive / Q000032:analysis*; D000512:Alpha Particles; D017076:Computer-Aided Design; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation*; D011886:Radon / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055672:Static Electricity; D018511:Systems Integration
D000396:Air Pollutants, Radioactive; D011886:Radon