Testing of thoron cross-interference of continuous radon measuring instruments
Turtiainen, Tuukka; Mitev, Krasimir; Dehqanzada, Rohafza; Holmgren, Olli; Georgiev, Strahil (2022-03-04)
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Turtiainen, Tuukka
Mitev, Krasimir
Dehqanzada, Rohafza
Holmgren, Olli
Georgiev, Strahil
European Radon Association
04.03.2022
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Journal of the European Radon Association : 3
Tiivistelmä
Thoron (220Rn) may interfere with radon (222Rn) measurements, if present. We measured the thoron cross-interference (CI) signal of nine types of electronic radon instruments in constant thoron concentration without the presence of radon. The CI signal increases for the first 3 days of the exposure. Also, the initial interference signal may vary between instruments. Therefore, we propose a new test method for quantifying the thoron CI in radon measuring instruments. This includes exposure of the instrument in constant thoron concentration for a minimum of 3 days and fitting the acquired data in a simplified function, which will provide two parameters: initial and final CI.