| 摘要 |
<p>A method and generator for preparing the radioisotope of lead, <2><1><2>Pb, whereby <2><2><8>Th, in a closed chamber, is allowed to decay to gaseous <2><2><0>Rn which is then readily separated from the thorium and other decay products by diffusing the <2><2><0>Rn gas into a second chamber, where it decays to <2><1><2>Pb which can then be collected from the second chamber. The <2><2><8>Th preferably is amorphous, such as thorium stearate. Collection of <2><1><2>Pb occurs in a medium of high and open porosity into which the <2><2><0>Rn diffuses so that the decay products recoil into the medium. The <2><1><2>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. <IMAGE></p> |
