Patent Number: 
Section: claims

1. A reactor operable to produce an isotope, the reactor comprising: an activation cell for containing controlled nuclear fission reactions, the activation cell segmented into n independent compartments, wherein n is an integer greater than or equal to 2, wherein the n compartments are radially disposed about a central axis of the activation cell, wherein the n compartments collectively comprise the annular activation cell that is concentrically disposed about a target chamber, wherein each of the compartments is configured for containing a parent material in an aqueous solution, wherein the parent material interacts with neutrons to produce the isotope via fission reactions in each compartment, and wherein the compartments are configured proximal to each other to facilitate neutron multiplication. 2. The reactor of claim 1, wherein the fission reactions are maintained at a subcritical level, and driven by a neutron source. 3. The reactor of claim 2, wherein the neutron source comprises the target chamber and an ion source, the ion source operable to produce an ion beam from a gas, wherein the target chamber contains a target, the target interacting with the ion beam to produce neutrons. 4. The reactor of claim 2, wherein the ion source and the target chamber together at least partially define a fusion reactor. 5. The reactor of claim 1, wherein the parent material comprises uranium. 6. The reactor of claim 5, wherein the parent material comprises low enriched U-235. 7. The reactor of claim 1, wherein the isotope comprises Mo-99. 8. The reactor of claim 1, wherein the isotope comprises Mo-99, I-131, I-125, Xe-133, Cs-137, Co-60, or Sr-89. 9. The reactor of claim 1, wherein at least two adjacent compartments share a divider. 10. The reactor of claim 9, comprising a plurality of dividers, each divider dividing at least two adjacent compartments. 11. The reactor of claim 9, wherein the divider physically separates the adjacent compartments. 12. The reactor of claim 1, wherein the plurality of compartments is configured for interaction of the parent material with neutrons simultaneously in each compartment. 13. The reactor of claim 1, wherein the compartments are circumferentially arranged in series. 14. The reactor of claim 1, wherein the target chamber is in a concentric relationship with at least one pair of diametrically opposed compartments. 15. The reactor of claim 3, wherein the target interacts with the ion beam to produce neutrons via a fusion reaction. 16. A reactor operable to produce an isotope, the reactor comprising:a target chamber; andan annular activation cell, wherein the annular activation cell is segmented into a plurality of independent compartments, each of the compartments configured for containing a parent material in an aqueous solution,wherein the plurality of compartments collectively comprises the annular activation cell that is concentrically disposed about the target chamber,wherein the compartments are radially disposed about a central axis of the annular activation cell and the compartments are circumferentially arranged in series,wherein the parent material interacts with neutrons to produce the isotope via fission reactions in each compartment, andwherein the compartments are configured proximal to each other to facilitate neutron multiplication. 17. The reactor of claim 16, wherein the target chamber is concentric to the annular activation cell. 18. The reactor of claim 16, wherein the fission reactions are maintained at a subcritical level and driven by a neutron source, the neutron source comprising the target chamber and an ion source, the ion source operable to produce an ion beam from a gas, and wherein the target chamber contains a target, the target interacting with the ion beam to produce neutrons via fusion reactions.