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.

中文翻译：

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卡纳塔克邦哈桑市室内和室外环境中伽马剂量率的研究。

已在哈桑市的室内和室外空气中测量了伽马射线剂量率。使用轻型便携式辐射测量仪（闪烁仪）在距离地表 1 m 的哈桑市 25 个地点进行辐射测量、地球物理和环境测量，进行测量。仪表读数在平均值附近波动，并且与设备检测到的计数率成正比。这是因为放射性的随机性。在本研究中，室内和室外空气中吸收的伽马剂量率从 69 ± 2 到 481 ± 18 nGy h-1 不等，几何平均值为 180 ± 6 nGy h-1 和 20 ± 0 到 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从 0.34 到 2.36 mSv y-1 不等，几何平均值为 0.88 mSv y-1 和 0.02 到 0。45 mSv y-1，几何平均值为 0.12 mSv y-1。哈桑市的伽马剂量率高于世界平均值，低于印度其他地区。