Method and generator for producing radioactive lead - 212

Details Method and generator for producing radioactive lead - 212 Method and generator for producing radioactive lead - 212

B - Operations, Transporting

01

J

B01J 19/08 (2006.01) A61K 51/12 (2006.01) G21G 4/00 (2006.01) G21G 4/08 (2006.01)

Patent

CA 2046546

ABSTRACT A method and generator for preparing the radioisotope of lead, 212Pb, whereby 228Th, in a closed chamber, is allowed to decay to gaseous 220Rn which is then readily separated from the thorium and other decay products by diffusing the 220Rn gas into a second chamber, where it decays to 212Pb which can then be collected from the second chamber. The 228h preferably is amorphous, such as thorium stearate. Collection of 212Pb occurs in a medium of high and open porosity into which the 220Rn diffuses so that the decay products recoil into the medium. The 212Pb can be recovered from this medium by dissolving the medium or by reacting it with an antibody-chelating complex solution to entrap it in the antibody-chelating complex.

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