FIELD: liquid scintillation alpha-spectrometry. SUBSTANCE: dish of optic quantum amplifier is used in correspondence with process of scintillation alpha-spectrometric measurement of activity of radio nuclides in the capacity of dish of liquid scintillator with radio nuclides to be determined. Liquid scintillator with radio nuclides to be determined is injected into active substance of quantum amplifier prior to registration of scintillation bursts. Technical objective of invention lies in reduced error and lower limit of determination of activity of radio nuclides, in provision of their quantitative determination in case of simultaneous presence of several radio nuclides in specimen. EFFECT: reduced error and lower limit of determination of activity of radio nuclides. 2 dwg
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