Department of Physics, PES College of Engineering, Mandya 571401, India.
Department of Physics, Vidya Vikas Institute of Engineering and Technology, Mysuru 570028, India.
Radiat Prot Dosimetry. 2020 Jul 2;188(4):516-521. doi: 10.1093/rpd/ncaa003.
Gamma-ray dose rates have been measured in the indoor and outdoor air of Hassan City. The measurements were done from 25 locations of Hassan City at 1 m above the ground surface for radiometric, geophysical and environmental surveys using a lightweight portable radiation survey meter (scintillometer). The meter reading fluctuates around a mean value and is proportional to the count rate detected by the unit. This is because of the random nature of radioactivity. In the present study, the absorbed gamma dose rates in indoor and outdoor air varies from 69 ± 2 to 481 ± 18 nGy h-1 with a geometric mean of 180 ± 6 nGy h-1 and 20 ± 0 to 371 ± 14 nGy h-1 with a geometric mean of 107 ± 3 nGy h-1. The annual effective gamma dose rates in indoor and outdoor air varies from 0.34 to 2.36 mSv y-1 with a geometric mean of 0.88 mSv y-1 and 0.02 to 0.45 mSv y-1 with a geometric mean of 0.12 mSv y-1. The gamma dose rates of Hassan City is higher compared to the world average value and lower when compared to other locations of India.
已在哈桑市的室内和室外空气中测量了伽马射线剂量率。这些测量是在哈桑市的 25 个地点进行的，在距地面 1 米的高度上，使用轻便便携式辐射测量仪（闪烁计）进行了放射性、地球物理和环境调查。由于放射性的随机性，仪表读数在平均值附近波动，并且与单位检测到的计数率成正比。在本研究中，室内和室外空气中的吸收伽马剂量率变化范围为 69 ± 2 至 481 ± 18 nGy h-1，几何平均值为 180 ± 6 nGy h-1；变化范围为 20 ± 0 至 371 ± 14 nGy h-1，几何平均值为 107 ± 3 nGy h-1。室内和室外空气中的年有效伽马剂量率变化范围为 0.34 至 2.36 mSv y-1，几何平均值为 0.88 mSv y-1；变化范围为 0.02 至 0.45 mSv y-1，几何平均值为 0.12 mSv y-1。与世界平均值相比，哈桑市的伽马剂量率较高，与印度其他地区相比则较低。
