title: The portable device for continual measurement of radon progenies on filter using the detector Timepix.
abstract: In this article, a portable device was presented for continual measuring of equilibrium equivalent concentration (EEC) of (222)Rn based on the Timepix detector with 300-µm-thick active layer. In order to have a portable device, a filtration head was developed for collecting short-lived radon progenies attached on aerosols. The short-lived progenies are estimated from analysing alphas from decay of (218,214)Po from Millipore filter after termination of filtration. Comparison with beta measurement was done as well. The dependence of EEC on an air flow and filtration time was studied. The low-level detection limit for EEC was estimated from the last 10 min of 3-h decay measurement and was found in the range of 40-70 Bq m(-3). EEC was measured in National Radiation Protection Institute radon chamber, and results were compared with the commercial detector Fritra4.
authors.affiliation: National Radiation Protection Institute, Bartoskova 28, Prague 140 00, Czech Republic boris.bulanek@suro.cz.
authors.forename: Boris
authors.initials: B
authors.lastname: Bulanek
authors.affiliation: National Radiation Protection Institute, Bartoskova 28, Prague 140 00, Czech Republic.
authors.forename: Jiri
authors.initials: J
authors.lastname: Hulka
authors.affiliation: National Radiation Protection Institute, Bartoskova 28, Prague 140 00, Czech Republic.
authors.forename: Karel
authors.initials: K
authors.lastname: Jilek
authors.affiliation: Institute of Experimental and Applied Physics, Czech Technical University in Prague, Horska 3a/22, Prague 128 00, Czech Republic.
authors.forename: Ivan
authors.initials: I
authors.lastname: Stekl
mesh_terms: D000336:Aerosols; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis; D000512:Alpha Particles; D000703:Analog-Digital Conversion; D001610:Beta Particles; D004867:Equipment Design; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000379:methods; D011886:Radon / Q000032:analysis*; D017687:Radon Daughters / Q000032:analysis*; D012815:Signal Processing, Computer-Assisted; D012825:Silicon; D014462:Ultrafiltration
chemical_list: D000336:Aerosols; D000396:Air Pollutants, Radioactive; D017687:Radon Daughters; D011886:Radon; D012825:Silicon