title: Slănic-Prahova low background calibration facility.
abstract: The reduced background of 2 nSv h(-1) of the Slănic-Prahova Low Background Radiation Laboratory allowed installing a calibration stand for low-dose-rates dosimetry. The stand is provided with (60)Co, (137)Cs and (241)Am low activity sources. A Physikalisch-Technische Bundesanstalt-calibrated AUTOMESS 6150 AD-6 dose rate meter with a 6150 AD-b/H external probe was used to check to what extent this stand could serve as a low background calibration facility. A detailed analysis of possible uncertainties in measuring dose rates evidenced an extended uncertainty related to the certified calibration as well as instrument readings of about 3 % for a confidence level of 95 %. In these conditions, the experimentally determined dose rates for all three gamma ray sources and for source-to-probe distances varying between 0.3 and 2.0 m confirmed a good correlation between the calculated and measured dose rates. At the same time, dose rates perfectly obey to an inverse squared distances law.
authors.affiliation: Horia Hulubei National Institute for Physics and Nuclear Engineering, 30, Reactorului Str., PO Box MG-6, Magurele (Ilfov) 077125, Romania Doctoral School on Physics, University of Bucharest, 405, Atomistilor Str., PO Box MG-11, Magurele (Ilfov) 077125, Romania.
authors.forename: Aurelia
authors.initials: A
authors.lastname: Celarel
authors.affiliation: Department of Structure of Matter, Earth and Atmospheric Physics and Astrophysics, University of Bucharest, 405, Atomistilor Str., PO Box MG-11, Magurele (Ilfov) 077125, Romania o.duliu@upcmail.ro.
authors.forename: O G
authors.initials: OG
authors.lastname: Duliu
authors.affiliation: Horia Hulubei National Institute for Physics and Nuclear Engineering, 30, Reactorului Str., PO Box MG-6, Magurele (Ilfov) 077125, Romania.
authors.forename: S
authors.initials: S
authors.lastname: Bercea
authors.affiliation: Horia Hulubei National Institute for Physics and Nuclear Engineering, 30, Reactorului Str., PO Box MG-6, Magurele (Ilfov) 077125, Romania.
authors.forename: C
authors.initials: C
authors.lastname: Cenusa
mesh_terms: D000576:Americium; D001417:Background Radiation; D002138:Calibration; D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D006801:Humans; D011829:Radiation Dosage; D011835:Radiation Protection; D011874:Radiometry / Q000295:instrumentation* / Q000592:standards*
chemical_list: D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D000576:Americium