METHOD OF OBTAINING PB/BI FOR NUCLEAR MEDICINE Russian patent published in 2021 - IPC G21G4/08 

FIELD: nuclear medicine.

SUBSTANCE: invention relates to a technology for producing lead-211 / bismuth-211 (²¹¹Pb / ²¹¹Bi) for nuclear medicine. The method is based on the use of the effect of radon-219 (²¹⁹Rn) emanation by a source containing radium-223 (²²³Ra). The source is made by creating a thin dry solid layer of radium-223 on the surface of a porous / fibrous material with an outer surface. The source is placed in an installation consisting of a sealed gas loop with forced circulation of a gas flow and a collector for the deposition of gaseous ²¹⁹Rn. It's necessary to create an ice layer on the inner walls of the collector by cooling it and simultaneously injecting a water aerosol into the collector. The deposition of ²¹⁹Rn and the accumulation of its decay products containing the target product are carried out on the surface of the ice layer of the collector, and the extraction of ²¹¹Pb / ²¹¹Bi is carried out by heating the walls of the collector and collecting the formed melt water.

EFFECT: invention makes it possible to simplify technology of obtaining ²¹¹Pb / ²¹¹Bi, to increase yield and to ensure high radiochemical purity of the target radionuclide.

12 cl, 1 dwg