The present study is carried out in selected locations of the Champawat district in the lesser Kumaun Himalayan belt of Uttarakhand, India. The Scintillation detector-based portable Smart RnDuo monitor was used to estimate exhalation rates of ²²²Rn and ²²⁰Rn. The levels of gamma dose rates were also measured using a portable radiation survey meter at each of the selected locations. The mass exhalation rate for ²²²Rn varies between 7.8 ± 0.1 and 107.3 ± 2.1 mBq kg⁻¹ h⁻¹ with an average of 38.9 ± 18.9 mBq kg⁻¹ h⁻¹. In contrast, the ²²⁰Rn surface exhalation rate ranges from 0.7 ± 0.5 to 14.3 ± 0.7 Bq m⁻² s⁻¹with an average 6.2 ± 3 Bq m⁻² s⁻¹ and emanation rate was found to range 88.4 and 1703.7 mBq kg⁻¹ s⁻¹ with an average 739 ± 356.7 mBq kg⁻¹ s⁻¹. The gamma dose rate was found to vary from 0.08 ± 0.01 to 0.30 ± 0.03 µSv h⁻¹ with an average of 0.18 ± 0.06 µSv h⁻¹ in the region.

本研究是在印度北阿坎德邦小库曼喜马拉雅带的 Champawat 地区的选定地点进行的。基于闪烁探测器的便携式 Smart RnDuo 监测器用于估计²²² Rn 和²²⁰ Rn 的呼气速率。还使用便携式辐射测量仪在每个选定地点测量伽马剂量率水平。²²² Rn的质量呼出速率在 7.8 ± 0.1 和 107.3 ± 2.1 mBq kg ^-1  h ^{-1 之间变化}，平均为 38.9 ± 18.9 mBq kg ^-1  h ^-1。相比之下，²²⁰ Rn 表面呼气速率范围从 0.7 ± 0.5 到 14.3 ± 0.7 Bq m ^-2  s^-1平均为 6.2 ± 3 Bq m ^-2  s ^-1，散发率范围为 88.4 和 1703.7 mBq kg ^-1  s ^-1，平均为 739 ± 356.7 mBq kg ^-1  s ^-1。发现伽马剂量率从 0.08 ± 0.01 到 0.30 ± 0.03 µSv h ^{-1 变化}，该区域的平均值为 0.18 ± 0.06 µSv h ^-1。