title: Scintillation beta-spectrometer with enhanced sensitivity.
abstract: The design of a high-sensitive scintillation beta-spectrometer applied for measuring the content of (90)Sr in environmental samples against the background (40)K and (137)Cs is described. The spectrometer includes a plastic detector with developed surface, to be simultaneously used as a sample container. The content of (90)Sr is determined having a beta-spectrum region of interest 1311-2282 keV. The minimum detectable specific activity of the spectrometer is 3.5 Bq/kg for solid granular samples with a mass of 1000 g and a measuring time of 2 h.
authors.affiliation: Taras Shevchenko National University of Kyiv, 2, Build.11, Akademician Glushkov Prosp., Kyiv 03022, Ukraine. ndef@univ.kiev.ua
authors.forename: I
authors.initials: I
authors.lastname: Kadenko
authors.forename: V
authors.initials: V
authors.lastname: Maydanyuk
authors.forename: V
authors.initials: V
authors.lastname: Petryshyn
authors.forename: G
authors.initials: G
authors.lastname: Primenko
authors.forename: Yu
authors.initials: Y
authors.lastname: Sedov