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Applied Radiation and Isotopes
Year: 2009  |  Volume: 67  |  Issue: 9  |  Page No.: 1691 - 1696

International intercomparisons of integrating radon detectors in the NIRS radon chamber

Miroslaw Janik, Shinji Tokonami, Tibor Kovacs, Norbert Kavasi, Chutima Kranrod, Atsuyuki Sorimachi, Hiroyuki Takahashi, Nobuyuki Miyahara and Tetsuo Ishikawa    

Abstract: An international intercomparison of integrating detectors was conducted at NIRS (National Institute of Radiological Science, Japan) with a 24.4 m3 inner volume walk-in radon chamber that has systems to control radon concentration, temperature and humidity.

During the first intercomparison (05.2007) four groups participated from four countries and for the second intercomparison (10.2007) 17 participants were involved from 11 countries.

Most of detectors are in good agreement with each other when compared to the radon level provided by the radon chamber. It appeared that the 70% of detectors are unified within the 20% margin of uncertainty.

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