METHOD FOR MANUFACTURING A BETA RADIATION SOURCE BASED ON NICKEL-63 RADIONUCLIDE Russian patent published in 2022 - IPC G21G4/04 

FIELD: radioisotopic products.

SUBSTANCE: invention relates to a method for manufacturing radionuclide sources of ionizing radiation, in particular beta radiation sources based on nickel-63 radionuclide used in ionization detectors of mass spectrometers, thickness gauges and other devices. The method involves the manufacture of an ionizing beta radiation source based on nickel-63 radionuclide in the form of a foil of arbitrary geometric shape, including electrochemical deposition of nickel-63 metal on a conductive substrate. As a substrate for deposition, an aluminum sheet with a thickness of 50-100 microns is used, with a front (working) side coated with a layer of metallic zinc deposited by chemical deposition, and on the reverse side with a current-insulating material (varnish, paint, photoresist, polymer film, etc.). After deposition of nickel-63, the substrate is given a predetermined geometric shape by mechanical processing. After giving the source the required geometric shape, the substrate on which nickel-63 was deposited is washed with an organic solvent to remove the current-insulating coating. Then, after treatment with a sodium hydroxide solution with a concentration of 20 g/l, the finished foil, consisting of metallic nickel-63, is washed with water and ethyl alcohol and dried in air.

EFFECT: manufacture of a beta radiation source emitting beta particles at an angle of 4π, consisting only of radioactive nickel-63, and not containing a substrate, as well as the possibility of manufacturing a source of arbitrary geometric shape and a given thickness, including less than 2 microns.

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