摘要
本文采用Rn Tn固体径迹累积探测器 ,对甘肃省宁县 6间窑洞 (明窑 )和传统土炕表面空气中2 2 2 Rn、2 2 0 Rn浓度及其分布进行了测量。结果表明 ,在 2 0 0 1年 1 0月～ 2 0 0 2年 1月的暴露时间内 ,由累积探测器测量得到的窑洞中2 2 2 Rn、2 2 0 Rn浓度的均值分别为 1 61和 30 7Bq·m- 3(距墙 1 0cm处 )、99和1 5 8Bq·m- 3(房间中间 ) ;土炕表面空气中2 2 2 Rn、2 2 0 Rn浓度的均值分别为 1 33和 31 7Bq·m- 3(距炕面 5cm)、1 79和 1 4 5Bq·m- 3(距炕面 2 0cm)。房间中靠近土墙处的2 2 2 Rn、2 2 0 Rn浓度高于其他位置 ,炕表面2 2 2 Rn、2 2 0 Rn浓度与探测器布放的位置、高度以及是否加热等因素有关。
This paper describes the measured results of 222Rn and 220Tn concentrations in six cave dwellings and adobe Kang in Ning county of Gansu Province by using Rn-Tn solid-state nuclear track detectors. 222Rn and 220Tn concentrations are 161 and 307?Bq·m -3(10?cm from soil wall), 99 and 158 Bq·m -3(middle of the room)in cave dwellings, and 133 and 317 Bq·m -3 (5?cm above adobe Kang), 179 and 145 Bq·m -3 (20?cm above adobe Kang) on soil beds, respectively. 222Rn and 220Tn concentrations near the wall are higher than those obtained other place in the room. 222Rn and 220Tn concentrations above the adobe Kang are related to the distance from the surface of adobe Kang and heating situation. The residents sleep directly on the beds, especially for the children,the time staying on the adobe Kang are longer than other position. The dose of 222Rn and 220Tn from the traditional adobe Kang shouldbe continuously studied.$$$$(
出处
《辐射防护》
CAS
CSCD
北大核心
2003年第3期184-188,192,共6页
Radiation Protection
基金
国家自然科学基金资助项目 ( 10 175 0 0 7)。
