DEVICE FOR DETERMINING THE PROPORTIONS BY VOLUME OF A MULTIPLE-COMPONENT MIXTURE BY IRRADIATION WITH SEVERAL GAMMA LINES

摘要

IN THE UNITED STATES PATENT OFFICE APPLICATION OF WALFRIED MICHAELIS and HANS-ULRICH FANGER FOR "DEVICE FOR DETERMINING THE PROPORTIONS BY VOLUME OF A MULTIPLE-COMPONENT MIXTURE BY IRRADIATION WITH SEVERAL GAMMA LINES" A device for determining the proportions by volume of an n-component mixture whose components have differing mean atomic numbers includes a source for irradiating the mixture on a common axis with n-1 gamma lines of different energies, that is to say gamma radiation with n-1 energy peaks at different energies, at which the absorption coefficients are different. A number of radiation detectors equal to the number of gamma lines used are provided each of which measures the intensity of only a respective one of the gamma lines and calculating unit uses the measured intensities to calculate the said proportions by volume, 1.