title: Investigation of alpha and beta self-absorption factors in the calibration of water sample measurements.
abstract: Detector efficiencies and self-absorption factors for a variety of sample preparation methods and naturally occurring dissolved ions have been studied for the gross alpha and gross beta measurement of water samples. The most consistent results are obtained for samples prepared by evaporation of small volumes of water under an infrared lamp. Due to its uniform and homogeneous deposition in the cupped stainless steel planchet, CaCO₃ was found to best serve as the dry residue radionuclide carrier in this study. Detector efficiencies and self-absorption factors for gross alpha and gross beta measurements closely follow the expected exponential and logarithmic dependence, respectively.
authors: Nuclear Engineering Seibersdorf GmbH, Seibersdorf, Austria. chowunchun.valentin@nes.at
authors: C P
authors: CP
authors: Valentin
authors: J
authors: J
authors: Kratky
authors: A
authors: A
authors: Brandl
mesh_terms: D000042:Absorption; D000512:Alpha Particles; D001317:Austria; D001610:Beta Particles; D002138:Calibration; D004784:Environmental Monitoring / Q000592:standards*; D011829:Radiation Dosage; D011868:Radioisotopes / Q000032:analysis* / Q000592:standards*; D011874:Radiometry / Q000592:standards*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014867:Water / Q000032:analysis*
chemical_list: D011868:Radioisotopes; D014867:Water