Apparatus for radiation analysis

Claim 1

In an apparatus for radiation analysis for measurement of mass of each of a plurality of components included in a substance to be measured, said apparatus for radiation analysis comprising: a source of radiation for irradiating the substance to be measured; systems of measurement smaller in number by one than the number of different kinds of components, for detecting intensity of back scattering produced in said substance to be measured due to the irradiation of said substance; and a processing unit for determining the mass of each of the components through execution of a predetermined four-rule arithmetic computation by the use of the intensity of back scattering provided by the output from said systems of measurement, as well as mass absorption coefficients for incident photons, mass back scattering coefficients for said incident photons, and mass absorption coefficients for back scattered photons, which are previously given coefficients relative to each of the components; each of the systems of measurement of back scattering being formed of a pulse-height discriminator for delivering output pulses of a given frequency at a predetermined level when pulse-height values of the signal indicating the intensity of the back scattering are within a predetermined range and a counting-rate meter for delivering an output at a level corresponding to the frequency of the output pulses of said pulse-height discriminator; said processing unit executing said four-rule arithmetic computation in accordance with the following equations ##EQU9## where ρ is the mass density of the substance ρ 1 is the mass density of component 1 ρ 2 is the mass density of component 2 ρ 3 is the mass density of component 3.