Performance test for radon measuring instruments using radon chamber at PTB

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• 作者：Atsuyuki Sorimachi^a ; Tetsuo Ishikawa^b ; Shinji Tokonami^a ; ^{tokonami@cc.hirosaki-u.ac.jp}
• 关键词：Ionization chamber ; NIRS ; Passive ; PTB ; Radon ; Scintillation cell
• 刊名：Applied Radiation and Isotopes
• 出版年：2012
• 期刊代码：6_09698043
• 类别：ce
• 出版时间：June, 2012
• 卷：70
• 期：6
• 页码：994-998
• 文件大小：418 K

摘要

An intercomparison on radon (²²²Rn) measuring instruments was carried out at the Physikalisch Technische Bundesanstalt, Germany (PTB). Two types of alpha track detectors based on a passive ²²²Rn-thoron (²²⁰Rn) discriminative measurement technique were used: these were the commercially available Raduet and Radopot detectors that were developed and calibrated by the National Institute of Radiological Sciences, Japan (NIRS). The ²²²Rn grab sampling and continuous measurement methods were also compared using the PTB pulse ionization chamber. The results using the passive detectors showed that there was a good agreement between the time-integrated ²²²Rn concentrations obtained from the Raduet detectors and the PTB pulse ionization chamber, as in the case with the Radopot detectors. In the grab sampling measurements, the agreement between the ²²²Rn concentrations measured using the NIRS gas storage ionization chamber and the PTB pulse ionization chamber was within 5%as in the case with the NIRS scintillation cell measurement. Similar to the measurements of the passive detectors and grab sampling, little distinct difference in the ²²²Rn concentration was observed for the NIRS continuous electrostatic collection monitor.