Quantification of radon/thoron exhalation rates of soil samples collected from district Faridabad of Southern Haryana, India

This paper describes radon mass exhalation rate ( $${J}_{m })$$ and thoron surface exhalation rate ( $${J}_{s}$$ ) of 46 soil samples of district Faridabad, Southern Haryana, India. Scintillation detector based SMART RnDuo (AQTEK System, India) coupled with exhalation chamber was used. Outdoor gamma exposure rate was measured by GM counter based survey meter. $${J}_{m }$$ of one sample and $${J}_{s}$$ of 95% samples were found higher than world average values of 57 mBq kg−1 h−1 and 3600 Bq m−2 h−1 for $${J}_{m}$$ and $${J}_{s}$$ respectively reported by UNSCEAR 2000. No significant correlation was observed between radon/thoron exhalation rates with outdoor gamma exposure rate.