METHOD OF DETERMINING Th (THORIUM) ISOTOPE ACTIVITY IN URANIUM-CONTAINING MINERALS Russian patent published in 2019 - IPC G21G1/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to a method of determining ²³⁰Th alpha activity. Control of chemical yield of target nuclide is carried out by value of ²³⁴Th isotope activity, contained in the studied mineral and in a state of secular equilibrium with parent isotope ²³⁸U. Method comprises successive determination of the full value of uranium-238 alpha activity in a sample, then determination of coefficient of beta-setting, then determination of chemical yield of thorium-230 and full ²³⁰Th alpha-activity in the sample. It is sufficient to use only one radio path required for controlling the chemical output of uranium-238.

EFFECT: determining chemical yield of thorium fraction and radioactivity of isotope ²³⁰Th, with compliance of results with actual experimental data obtained during radiochemical analysis of polycase – Ti-Ta-niobate with mineral formula AB₂O₆.

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