A radon 222 traceability chain from primary standard to field detectors

Picolo, J.L.; Pressyanov, D.; Blanchis, P.; Barbier, Margaux; Michielsen, N.; Grassin, D.; Voisin, Vincent; Turek, K.

doi:10.1016/s0969-8043(99)00190-6

Cited by 23 publications

(9 citation statements)

References 5 publications

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“…The CF with this kind of monitors, obtained by modeling and experiments is in the range 0.03e0.4 cm À2 kBq À1 h À1 m 3 . For comparison with CDs at 80 mm depth we have obtained CF of about 0.02 cm À2 kBq À1 h À1 m 3 (Pressyanov, 2009) and with diffusion chambers used by the author, with LR-115/II detectors, CF ¼ 1.97 cm À2 kBq À1 h À1 m 3 (Picolo et al, 2000). We feel that 222 Rn monitors with external absorber/ radiator can complement successfully the conventional polycarbonate method and the traditional diffusion chambers.…”

Section: Resultsmentioning

confidence: 74%

Modeling response of radon track detectors with solid absorbers as radiators

Pressyanov

2011

Radiation Measurements

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Section: Resultsmentioning

confidence: 74%

Modeling response of radon track detectors with solid absorbers as radiators

Pressyanov

2011

Radiation Measurements

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“…For example, it allows to simulate the 6 mbar Martian atmosphere composed with CO 2 gas. The BACCARA installation is equipped with different 222 Rn sources and 222 Rn activity concentration instruments, the measurements of which are traceable to a primary radon source [ Picolo et al ., ]. The generated 222 Rn activity concentration is either quasi‐stationary or naturally decreasing (with a half‐life of ~3.8 days).…”

Section: Rn‐rich Environmentsmentioning

confidence: 99%

“…• New design of instrument to measure electric conductivity of air in high and variable electric field is proposed (Mars application) • Performances of new instrument to measure electric conductivity of air were tested in 222 Rn-rich environments • An analytical model is proposed with intention to explain the measured values of the air electric conductivity at different gas pressures and types of injected gas. In the BACCARA chamber of the Institute of Radioprotection and Nuclear Safety (IRSN), the established 222 Rn activity concentrations are traceable to a primary 222 Rn gas standard [Michielsen and Voisin, 1999;Picolo et al, 2000;Röttger et al, 2006].…”

Section: 1002/2016ea000241mentioning

confidence: 99%

“…Laboratory facilities offer stationary and controlled conditions of gas ionization associated with the choice of different gas pressures and types of injected gas. In the BACCARA chamber of the Institute of Radioprotection and Nuclear Safety (IRSN), the established 222 Rn activity concentrations are traceable to a primary 222 Rn gas standard [ Michielsen and Voisin , ; Picolo et al ., ; Röttger et al ., ].…”

Section: Introductionmentioning

confidence: 99%

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What we can learn from measurements of air electric conductivity in ²²²Rn‐rich atmosphere

Seran

Godefroy

Pili

et al. 2017

Earth and Space Science

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Electric conductivity of air is an important characteristic of the electric properties of an atmosphere. Testing instruments to measure electric conductivity ranging from~10 −13 to 10 −9 Sm −1 in natural conditions found in the Earth atmosphere is not an easy task. One possibility is to use stratospheric balloon flights; another (and a simpler one) is to look for terrestrial environments with significant radioactive decay. In this paper we present measurements carried out with different types of conductivity sensors in two 222 Rn-rich environments, i.e., in the Roselend underground tunnel (French Alps) and in the Institute of Radioprotection and Nuclear Safety BACCARA (BAnC de CAllibrage du RAdon) chamber. The concept of the conductivity sensor is based on the classical time relaxation method. New elements in our design include isolation of the sensor sensitive part (electrode) from the external electric field and sensor miniaturization. This greatly extends the application domain of the sensor and permits to measure air electric conductivity when the external electric field is high and varies from few tens of Vm −1 to up to few tens of kVm −1 . This is suitable to propose the instrument for a planetary mission. Two-fold objectives were attained as the outcome of these tests and their analysis. First was directly related to the performances of the conductivity sensors and the efficiency of the conductivity sensor design to shield the external electric field. Second objective aimed at understanding the decay mechanisms of 222 Rn and its progeny in atmosphere and the impact of the enclosed space on the efficiency of gas ionization.

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“…These disks were exposed in places where long-term measurements by diffusion chambers were made in the past. The diffusion chambers used are traceable to the primary 222 Rn standard (Picolo et al, 2000). The exposure of all disks had started before the measurements by Sofia Eleshnitsa Bouchovo Fig.…”

Section: Pilot Measurements Under Real Conditions and Feasibility Of mentioning

confidence: 99%