Method for production of lead-212 isotope

A method for producing Pb-212 isotope comprising:

• introducing Ra-224 into an emanation box,
• wherein the emanation box comprises an emanation source comprising a high-surface area material;
• introducing a carrier gas into the emanation box through a carrier gas feed,
• wherein the carrier gas is an inert gas,
• wherein the carrier gas flows through the emanation box,
• wherein the Ra-224 decays to Th-228 within the emanation box
• wherein the Th-228 decays to Rn-220 within the emanation box,
• wherein the carrier gas carries the Rn-220 resulting from decay of the Th-228 in the emanation box to one or more Rn-220 targets through a multi-way valve coupled to a carrier gas exit port of the emanation box;
• separating the Rn-220 from the carrier gas in the one or more Rn-220 targets;
• directing the carrier gas out of the one or more Rn-220 targets through a carrier gas exhaust port;
• directing a liquid through a liquid feed into the one or more Rn-220 targets;
• allowing the Rn-220 to undergo radioactive decay into Pb-212 isotope within the one or more Rn-220 targets;
• wherein the liquid dissolves the Pb-212 isotope produced by radioactive decay of Rn-220 within the one or more Rn-220 targets;
• directing the liquid containing the Pb-212 isotope from the one or more Rn-220 targets to a Pb-212 collection container;
• and
• separating the Pb-212 isotope from the liquid.