Liquid scintillation determination of low level components in complex mixtures of radionuclides

Tritium in surface waters of the Yenisei River basin

“…Tritium and other p-emitters, including 14 C, were identified and their activities calculated using the "SpectraDec" program for spectrum processing. The program involves a comparison of the experimental spectrum with the model one, which is obtained by calculation using the library of the spectra for certain isotopes [8]. The spectrometer efficiency in the Low-Level Counting Mode (LLC) was calibrated using standard reference tritium solutions.…”

Determination of integral cross sections of3H in Al foils monitors irradiated by protons with energies ranging from 40 to 2600 MeV

“…3 H activity in Al foil was determined using a low-background spectrometric α-, β-radiometer, Quantilus 1220, and a system of automatic sample preparation, A307 Sample Oxidizer. An analysis of the measured β-spectra was carried out with the SpectraDec code [6]. The formula for determining the reaction rate and cross-section production of 3 H are presented in [5].…”

Actinides and other radionuclides in sediments and submerged plants of the Yenisei River

“…Concentrations of ␣-emitting plutonium and americium isotopes were determined with a "Canberra" ␣-spectrometric system (USA). The procedure of measuring 241 Pu in samples using a TRI-CARB 2550 TR/AB liquid scintillation counter (Canberra Packard) and the "SpectraDec" software is described in detail elsewhere [5,6]. Sequential extraction technique proposed by Tessier and modified by Klemt et al [7] was used to investigate sediment samples (Table 1).…”