Mishra Rosaline, Rout R, Prajith R, Jalalluddin S, Sapra B K, Mayya Y S
Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400 094, India
Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400 094, India.
Radiat Prot Dosimetry. 2016 Oct;171(2):181-186. doi: 10.1093/rpd/ncw053. Epub 2016 Mar 23.
The decay products of radon and thoron are essentially the radioisotopes of polonium, bismuth and lead, and are solid particulates, which deposit in different parts of the respiratory tract upon inhalation, subsequently emitting high-energy alpha particles upon their radioactive decay. Development of passive deposition-based direct progeny sensors known as direct radon and thoron progeny sensors have provided an easy-to-use technique for time-integrated measurements of the decay products only. These dosemeters are apt for large-scale population dosimetry to assign inhalation doses to the public. The paper gives an insight into the technique, the calibration, comparison with the prevalently used active grab filter paper sampling technique, alpha track diameter analysis in these progeny sensors, progeny deposition velocity measurements carried out using these detector systems in the indoor as well as outdoor environment, and applications of these sensors for time-integrated unattached fraction estimation.
氡和钍射气的衰变产物本质上是钋、铋和铅的放射性同位素，并且是固体颗粒，吸入后沉积在呼吸道的不同部位，随后在其放射性衰变时发射高能α粒子。基于被动沉积的直接子体传感器（称为直接氡和钍射气子体传感器）的开发提供了一种仅用于衰变产物时间积分测量的易用技术。这些剂量计适用于大规模人群剂量测定，以确定公众的吸入剂量。本文深入介绍了该技术、校准方法、与普遍使用的主动采集滤纸采样技术的比较、这些子体传感器中的α径迹直径分析、使用这些探测器系统在室内和室外环境中进行的子体沉积速度测量，以及这些传感器在时间积分未附着部分估计中的应用。
