2020
DOI: 10.1038/s41598-020-73320-9
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An innovative technique of harvesting soil gas as a highly efficient source of 222Rn for calibration applications in a walk-in type chamber: part-1

Abstract: The paper describes a novel technique to harvest 222Rn laden air from soil gas of natural origin as a highly efficient source of 222Rn for calibration applications in a walk-in type 222Rn calibration chamber. The technique makes use of a soil probe of about 1 m to draw soil gas, through a dehumidifier and a delay volume, using an air pump to fill the calibration chamber. 222Rn concentration in the range of a few hundred Bq m−3 to a few tens of kBq m−3 was easily attained in the chamber of volume 22.7 m3 within… Show more

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Cited by 9 publications
(8 citation statements)
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“…As discussed just above, 222 Rn present in soil gas is used as a tracer for the determination of AER. Soil gas is a non-depleting reservoir of 222 Rn and is capable of providing steady concentration flux even when drawn continuously for a long time duration, as demonstrated in the previous publications ( Karunakara et al, 2015 , 2020 ; Shetty et al, 2020 ). The details of soil gas 222 Rn extraction were described in our earlier publications ( Karunakara et al, 2015 , 2020 ; Sudeep et al, 2012 ; Shetty et al, 2020 ).…”
Section: Methodsmentioning
confidence: 73%
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“…As discussed just above, 222 Rn present in soil gas is used as a tracer for the determination of AER. Soil gas is a non-depleting reservoir of 222 Rn and is capable of providing steady concentration flux even when drawn continuously for a long time duration, as demonstrated in the previous publications ( Karunakara et al, 2015 , 2020 ; Shetty et al, 2020 ). The details of soil gas 222 Rn extraction were described in our earlier publications ( Karunakara et al, 2015 , 2020 ; Sudeep et al, 2012 ; Shetty et al, 2020 ).…”
Section: Methodsmentioning
confidence: 73%
“…Soil gas is a non-depleting reservoir of 222 Rn and is capable of providing steady concentration flux even when drawn continuously for a long time duration, as demonstrated in the previous publications ( Karunakara et al, 2015 , 2020 ; Shetty et al, 2020 ). The details of soil gas 222 Rn extraction were described in our earlier publications ( Karunakara et al, 2015 , 2020 ; Sudeep et al, 2012 ; Shetty et al, 2020 ). A soil gas probe (STITZ, Genitron Instruments, Germany) was inserted inside the ground to a depth of 0.8–1 m since the 222 Rn concentration in soil gas increases exponentially with depth and saturates to an equilibrium concentration at a depth greater than about 0.8–1 m ( Nazaroff and Nero, 1988 ; Al-Azmi and Karunakara., 2007 ; Al-Azmi, 2009 ; Sudeep et al, 2012 ; Katalin et al, 2013 ; Shetty et al, 2019 ; 2020 ; Karunakara et al, 2015 , 2020 ).…”
Section: Methodsmentioning
confidence: 73%
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