Prasad G, Ishikawa T, Hosoda M, Sahoo S K, Kavasi N, Sorimachi A, Tokonami S, Uchida S
National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba-shi, Chiba 263-8555, Japan.
Radiat Prot Dosimetry. 2012 Nov;152(1-3):130-4. doi: 10.1093/rpd/ncs206. Epub 2012 Aug 23.
Radon and thoron exhalation rates and gamma-ray dose rate in different places in Hiroshima Prefecture were measured. Exhalation rates were measured using an accumulation chamber method. The radon exhalation rate was found to vary from 3 to 37 mBq m(-2) s(-1), while the thoron exhalation rate ranged from 40 to 3330 mBq m(-2) s(-1). The highest radon exhalation rate (37 mBq m(-2) s(-1)) and gamma-ray dose rate (92 nGy h(-1)) were found in the same city (Kure City). In Kure City, indoor radon and thoron concentrations were previously measured at nine selected houses using a radon-thoron discriminative detector (Raduet). The indoor radon concentrations varied from 16 to 78 Bq m(-3), which was higher than the average value in Japan (15.5 Bq m(-3)). The indoor thoron concentration ranged from ND (not detected: below a detection limit of approximately 10 Bq m(-3)) to 314 Bq m(-3). The results suggest that radon exhalation rate from the ground is an influential factor for indoor radon concentration.
对广岛县不同地点的氡和钍射气率以及伽马射线剂量率进行了测量。射气率采用累积室法进行测量。结果发现，氡射气率在3至37毫贝克勒尔每平方米每秒之间变化，而钍射气率在40至3330毫贝克勒尔每平方米每秒之间。最高的氡射气率（37毫贝克勒尔每平方米每秒）和伽马射线剂量率（92纳戈瑞每小时）出现在同一个城市（吴市）。在吴市，之前使用氡钍鉴别探测器（Raduet）对九所选定房屋的室内氡和钍浓度进行了测量。室内氡浓度在16至78贝克勒尔每立方米之间变化，高于日本的平均值（15.5贝克勒尔每立方米）。室内钍浓度范围从未检测到（低于约10贝克勒尔每立方米的检测限）到314贝克勒尔每立方米。结果表明，地面的氡射气率是影响室内氡浓度的一个因素。
Zotero 插件