Systems and methods for the cyclotron production of iodine-124
The present invention relates to targets, systems and methods for the cyclotron production of 124 I from aluminum telluride (Al 2 Te 3 ) targets. The systems and methods utilize low energy proton cyclotrons to produce 124 I by the 124 Te(p,n) reaction from enriched Al 2 Te 3 glassy melts. The 124 I is recovered in high yield from the glassy melt by adapted methods of common thermal distillation techniques.
1. A target material for the production of 124I comprising 124Te-enriched aluminum telluride.
2. The target material of claim 1 wherein the tellurium in the target material comprises at least about 95 atomic % 124Te.
3. The target material of claim 1 wherein the tellurium in the target material comprises at least about 99 atomic % 124Te.
4. The target material of claim 1 further comprising a support onto which the 124Te-enriched aluminum telluride is placed.
5. A system for the cyclotron production of 124I comprising a cyclotron, housing the target material of claim 1 .
6. The system of claim 5 , wherein the cyclotron is adapted to direct protons having an energy of no more than 18 MeV at the target material.
7. The system of claim 5 wherein the cyclotron is adapted to direct protons having an energy of no more than about 11 MeV at the target material.
8. The target material of claim 1 comprising at least 65 mass percent of the compound Al 2 124 Te 3 .
9. The target material of claim 1 comprising at least 75 mass percent of the compound Al 2 124 Te 3 .
10. The target material of claim 1 , wherein the target material consists of aluminum telluride, and further wherein the tellurium in the target material comprises at least 90 atomic percent 124Te.
11. The target material of claim 1 , wherein the target material is characterized in that the irradiation of 200 mg of the target material with protons for 2 hours at 18 μA yields at least 8 mCi of 124 I from the 124Te-enriched aluminum telluride in the target material.
12. The target material of claim 1 , wherein the target material comprises at least 200 mg of aluminum telluride.
13. The target material of claim 1 , further comprising a crucible comprising a material that is chemically inert to aluminum telluride, wherein the aluminum telluride is in contact with the material.
14. The target material of claim 1 , wherein the aluminum telluride is present in a quantity sufficient to dissipate the energy of incident protons in a cyclotron beam having a current of 20 μA.