title: Gross alpha and beta indices in water samples revisited.
abstract: Gross α and β indices for water samples are generally determined simultaneously when a gas-flow proportional counter is used. The thickness of the source and the α-particle energy are factors of great importance due to self-absorption or energy loss effects. Two variables have been studied: the use of different salts to produce standards with several thicknesses and the use of different radionuclides for the calibration process. Samples of known activity were prepared and measured for checking the procedures.
authors.affiliation: Department of Physics, University of Extremadura, 06006 Badajoz, Spain.
authors.forename: A B
authors.initials: AB
authors.lastname: Ruano Sánchez
authors.forename: A
authors.initials: A
authors.lastname: Martín Sánchez
authors.forename: J
authors.initials: J
authors.lastname: de la Torre Pérez
mesh_terms: D000512:Alpha Particles; D001417:Background Radiation; D005720:Gamma Rays; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014867:Water / Q000737:chemistry*; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D014875:Water Pollutants, Radioactive; D014867:Water
keywords: Gas-flow proportional counter; Gross alpha and beta indices; Water samples