A212Rn Reference Measurement System was recently developed at ENEA. The system is based on a radon transfer and counting system calibrated by a226Ra standard liquid solution. The reference counting instrument is a cylindrical electrostatic cell with a Si detector. It is used for the detection of the electrostatically collected218Po ions produced in the decay of222Rn. The activity of222Rn gas in a spherical glass bulb can be measured in the Reference Measurement System by a particular procedure that does not require volume determinations or any assumption of total radon removal from the liquid226Ra solution. The combined uncertainty estimated for the calibration of222Rn sources as in a typical gas transfer system is about 1% (one standard deviation). The Reference Measurement System and the operational procedure adopted by ENEA are described together with a short outline of the transfer instrument based on a Nal(Tl) well-type detector used for calibration purposes.
|Pages (from-to)||445 - 451|
|Number of pages||7|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - 1 Feb 1996|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
De Felice, P., & Myteberi, X. (1996). The. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 369(2-3), 445 - 451. https://doi.org/10.1016/S0168-9002(96)80028-3