TY JOUR TI Development and Verification of the Method for b-Spectrum Decomposition of Radionuclides’ Mixtures Based on Piecewise-Combined Functions with Polynomial or Piecewise-Linear Approximation of their Parameters KW beta-spectrometry KW method of spectra processing KW volume activity KW tritium KW K-40 KW Sr-90 KW water samples KW urine samples KW software JO ANRI AU Vostrotin, V.V. AU Vvedensky, V.E. PY 2023 IS 0 PB Scientific-Production Enterprise “Dosa”