Singh Sanjay, Jaishi Hari Jaishi, Tiwari Raghavendra Prasad, Tiwari Ramesh Chandra
Department of Physics, Mizoram University, Aizawl 796004, India.
Department of Geology, Mizoram University, Aizawl 796004, India.
Radiat Prot Dosimetry. 2014 Nov;162(1-2):73-7. doi: 10.1093/rpd/ncu221. Epub 2014 Jul 4.
The present study concerns measurements of radon emissions from soil carried out during March to July 2013 at Chite fault in Aizawl district, Mizoram, India. In this study, continuous radon monitoring in soil was done by using LR-115 type II nuclear track detector (Kodak-Pathe, France make), and the exposed films were replaced weekly. A negative correlation coefficient (-0.47) between radon concentration and barometric pressure was found during the investigation period. The average radon concentration was observed to be 1785.71 Bq m(-3) with a standard deviation of 633.07 Bq m(-3). The maximum and minimum values of radon concentration during this period were found to be 3693.88 and 904.76 Bq m(-3), respectively. An anomalous increase in radon concentration was observed on 112th day (i.e. on 14 June 2013) during the investigation period just 1 d prior to the event of M 3.5, which occurred within 120-km distance from the monitoring site.
本研究涉及2013年3月至7月在印度米佐拉姆邦艾藻尔县奇特断层进行的土壤氡气排放测量。在本研究中，使用LR - 115 II型核径迹探测器（法国制造的柯达 - 派特公司产品）对土壤中的氡气进行连续监测，每周更换曝光的胶片。在调查期间发现氡浓度与气压之间存在负相关系数（-0.47）。观察到平均氡浓度为1785.71 Bq m(-3)，标准偏差为633.07 Bq m(-3)。在此期间，氡浓度的最大值和最小值分别为3693.88和904.76 Bq m(-3)。在调查期间的第112天（即2013年6月14日），在距离监测点120公里范围内发生M 3.5地震事件的前1天，观察到氡浓度异常增加。
