Productions of radioisotopes
The present disclosure generally relates to methods and structures for the production of radioisotopes from the thermal neutron irradiation of selected natural isotopes. The methods, structures and operations are applicable to the production of any radioisotope that may be produced from neutron irradiation.
1. A fixture for the production of Mo-99, the fixture configured to be disposed within a nuclear reactor to expose the fixture to a neutron field of the nuclear reactor, the fixture comprising:
a positively charged anode;
a source material disposed within the fixture, the source material at least partially comprising Mo-98 target material, the Mo-98 target material disposed in an annular canister and exposed to a neutron flux field when the fixture is disposed in the neutron field of the nuclear reactor, the positively charged anode providing a positive electric charge to the Mo-98 target material;
a negatively charged cathode;
a cathode collector disposed within the fixture and spaced apart from the source material such that an environment is disposed between the cathode collector and the source material, the negatively charged cathode being electrically coupled to the cathode collector to provide a negative electric charge to the cathode collector; and
a vacuum port connected to the fixture, the vacuum port allowing a vacuum environment to be disposed within the fixture, the vacuum environment including at least a portion of the environment disposed between the cathode collector and the source material, the vacuum environment disposed between the cathode collector and the source material having a generally annular configuration;
wherein the exposure of the Mo-98 target material to the neutron flux field of the nuclear reactor produces Mo-99 ions from the Mo-98 target material; and
wherein the cathode collector is configured to collect the Mo-99 ions.
2. The fixture for the production of Mo-99 of claim 1 , wherein the positively charged anode is connected to the fixture; and
wherein the negatively charged cathode is connected to the fixture.
3. The fixture for the production of Mo-99 of claim 1 , wherein the Mo-98 target material is disposed near an outer surface to facilitate production of Mo-99.
4. The fixture for the production of Mo-99 of claim 1 , wherein the positively charged anode is electrically coupled to the Mo-98 target material.
5. The fixture for the production of Mo-99 of claim 1 , further comprising an electrical conducting layer disposed on the Mo-98 target material, the electrical conducting layer connected to the positively charged anode.
6. The fixture for the production of Mo-99 of claim 1 , wherein the Mo-98 target material includes at least one of the following: a sheet of the Mo-98 target material, a wire gauze of the Mo-98 target material, particulates of the Mo-98 target material, powders of the Mo-98 target material, spheres of the Mo-98 target material, and/or whiskers of the Mo-98 target material.
7. The fixture for the production of Mo-99 of claim 1 , further comprising a containment shell and a structural support.
8. The fixture for the production of Mo-99 of cm 1 , wherein the source material is disposed within a source material canister.
9. The fixture for the production of Mo-99 of claim 1 , wherein the Mo-98 target material comprises one or more whiskers.
10. The fixture for the production of Mo-99 of claim 1 , wherein the Mo-98 target material comprises one or more or a combination of a sheet of the Mo-98 target material, a wire gauze of the Mo-98 target material, particulates of the Mo-98 target material, powders of the Mo-98 target material, spheres of the Mo-98 target material, and whiskers of the Mo-98 target material.
11. The fixture for the production of Mo-99 of claim 1 , further comprising a containment shell and a structural support, the source material being disposed within a source material canister, the source material canister being comprised of one or more or a combination of a magnesium metal, an aluminum metal, and zirconium metal.
12. The fixture for the production of Mo-99 of claim 1 , further comprising a compaction fencing that includes a mesh with openings that are smaller in size than material particles of the Mo-98 target material.
13. A fixture for the production of Mo-99 of claim 1 , wherein an electric field is at least partially disposed between the source material and the cathode collector;
wherein the exposure of the Mo-98 target material to the neutron flux field within a nuclear reactor produces positively charged ions from the Mo-98 target material;
wherein the positively charged ions move towards the negatively charged cathode collector due to the electric field.
14. The fixture for the production of Mo-99 of claim 12 , further comprising a containment shell, a structural support, and a source material canister, the source material being disposed within the source material canister.
15. The fixture for the production of Mo-99 of claim 12 , wherein the exposure of the Mo-98 target material to the neutron flux field within the nuclear reactor produces Mo-99 from the target material via neutron capture.