Ramola R C, Prasad G, Gusain G S, Rautela B S, Choubey V M, Sagar D Vidya, Tokonami S, Sorimachi A, Sahoo S K, Janik M, Ishikawa T
Department of Physics, H.N.B. Garhwal University, Badshahi Thaul, Tehri Garhwal, India.
Radiat Prot Dosimetry. 2010 Oct;141(4):379-82. doi: 10.1093/rpd/ncq238. Epub 2010 Sep 10.
This paper presents the preliminary results of radon and thoron measurements in the houses of Chhatrapur area of southeastern coast of Orissa, India. This area is one of the high radiation background radiation areas in India, which consists of monazite sand as the source of thoron. Both active and passive methods were employed for the measurements. Radon and thoron concentrations were measured in the houses of Chhatrapur area using twin cup radon dosemeters, RAD7 and radon-thoron discriminative detector (Raduet). Thoron progeny concentration was also measured in the houses using deposition rate measurements. Radon and thoron concentrations in the houses of study area were found to vary from 8 to 47 Bq m(-3) and the below detection level to 77 Bq m(-3), respectively. While thoron progeny concentration in these houses ranges between 0.17 and 4.24 Bq m(-3), preliminary investigation shows that the thoron concentration is higher than radon concentration in the houses of the study area. The thoron progeny concentration was found to be comparatively higher, which forms a base for further study in the area. The comparison between the results of various techniques is presented in this paper.
本文介绍了在印度奥里萨邦东南海岸恰特拉普尔地区房屋中进行氡和钍射气测量的初步结果。该地区是印度高辐射本底辐射地区之一，以独居石砂作为钍射气的来源。测量采用了主动和被动两种方法。使用双杯式氡剂量计、RAD7和氡 - 钍射气鉴别探测器（Raduet）在恰特拉普尔地区的房屋中测量氡和钍射气浓度。还通过沉积率测量在房屋中测量钍射气子体浓度。研究区域房屋中的氡和钍射气浓度分别在8至47 Bq m(-3)以及低于检测限至77 Bq m(-3)之间变化。这些房屋中的钍射气子体浓度在0.17至4.24 Bq m(-3)之间，初步调查表明研究区域房屋中的钍射气浓度高于氡浓度。发现钍射气子体浓度相对较高，这为该地区的进一步研究奠定了基础。本文给出了各种技术结果之间的比较。
