title: Low-level atmospheric radioactivity measurement using a NaI(Tl) spectrometer during aerosol sampling.
abstract: In order to increase the early warning ability of the radiation monitoring network of the Czech republic, a high-volume aerosol sampler was upgraded with a NaI(Tl) probe placed directly above the aerosol filter. The paper demonstrates the possibility of using a method based on principal component regression to accurately subtract the complicated natural background caused by radon decay products. This approach yielded minimum detectable activities of 8mBq/m3, 3mBq/m3and 7mBq/m3for131I,134Cs and137Cs, respectively, after 24h of sampling.
authors.affiliation: National Protection Institute (SÚRO), Bartoškova 28, 140 00 Prague, Czechia. Electronic address: miroslav.hyza@suro.cz.
authors.forename: Miroslav
authors.initials: M
authors.lastname: Hýža
authors.affiliation: National Protection Institute (SÚRO), Bartoškova 28, 140 00 Prague, Czechia.
authors.forename: Petr
authors.initials: P
authors.lastname: Rulík
mesh_terms: D000336:Aerosols; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D000465:Algorithms; D002588:Cesium Radioisotopes / Q000032:analysis; D018153:Czech Republic; D006801:Humans; D007454:Iodides; D007457:Iodine Radioisotopes / Q000032:analysis; D025341:Principal Component Analysis; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000379:methods / Q000706:statistics & numerical data; D012044:Regression Analysis; D012964:Sodium; D013051:Spectrometry, Gamma / Q000295:instrumentation* / Q000379:methods / Q000706:statistics & numerical data; D013793:Thallium
chemical_list: D000336:Aerosols; D000396:Air Pollutants, Radioactive; D002588:Cesium Radioisotopes; D007454:Iodides; D007457:Iodine Radioisotopes; C000614965:Iodine-131; C477364:thallium-doped sodium iodide; C000614989:Cesium-137; D012964:Sodium; D013793:Thallium; C000614987:Cesium-134
keywords: Atmosphere; Gamma spectrometry; Radioactive aerosol; Real time; Spectrum analysis