device and method for measuring the activity of radioactive samples, which contain several radioactive isotopes without separate provision of the löschniveaus.

摘要

Liquid scintillation counter comprising a memory having stored spectra of known counting efficiencies and known levels of quench, for the isotopes to be measured, means for extracting from said spectra by using said determined quench level value, for each of said N isotopes, a reference spectrum representing a pure isotope spectrum at said determined quench level, and means for determining for each extracted reference spectrum a factor by which said extracted reference spectrum is to be multiplied in order to fit the sum of the multiplied reference spectra to the sample spectrum, each said factor being directly related to the amount of each isotope in the sample. Method in liquid scintillation counter comprising: extracting from stored spectra of known counting efficiencies and known levels of quench, for each of said N isotopes, a reference spectrum representing a pure isotope spectrum at the determined quench level, and determining for each extracted reference spectrum a factor by which said extracted reference spectrum is to be multiplied in order to fit the sum of the multiplied reference spectra to the sample spectrum, each factor being directly related to the amount of each isotope in the sample.