Details

Autor(en) / Beteiligte

• Semwal, Poonam
• Singh, Kuldeep
• Agarwal, T. K.
• Joshi, Manish
• Pant, Preeti
• Kandari, Tushar
• Ramola, R. C.

Titel

Measurement of 222Rn and 220Rn exhalation rate from soil samples of Kumaun Hills, India

Ist Teil von

• Acta geophysica, 2018-10, Vol.66 (5), p.1203-1211

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The source terms, i.e., exhalation and emanation from soil and building materials are the primary contributors to the radon ( 222 Rn)/thoron ( 220 Rn) concentration levels in the dwellings, while the ecological constraints like ventilation rate, temperature, pressure, humidity, etc., are the influencing factors. The present study is focused on Almora District of Kumaun, located in Himalayan belt of Uttarakhand, India. For the measurement of 222 Rn and 220 Rn exhalation rates, 24 soil samples were collected from different locations. Gamma radiation level was measured at each of these locations. Chamber technique associated with Smart Rn Duo portable monitor was employed for the estimation of 222 Rn and 220 Rn exhalation rates. Radionuclides ( 226 Ra, 232 Th and 40 K) concentrations were also measured in soil samples using NaI(Tl) scintillation based gamma ray spectrometry. The mass exhalation rate for 222 Rn was varying between 16 and 54 mBq/kg/h, while the 220 Rn surface exhalation rate was in the range of 0.65–6.43 Bq/m 2 /s. Measured gamma dose rate for the same region varied from 0.10 to 0.31 µSv/h. Inter-correlation of exhalation rates and intra-correlation with background gamma levels were studied.