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

1990-07-10

1991-08-06

Berman, Jack I.

Radiant energy

Fluent material containment, support or transfer means

With irradiating source or radiating fluent material

423 2, 423 89, 252645, G21G 406

Patent

active

050380460

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

REFERENCES:
patent: 3801818 (1974-04-01), Hulit et al.
patent: 4663129 (1987-05-01), Atcher et al.
Zucchini et al., Int. J. Nucl. Med. Biol., vol. 9, No. 1, 1982, pp. 83-84.

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