|Candidate elements for transmutation|
The radioactive elements that are good candidates for transmutation because of their long half-life are the minor actinides and some fission products. The minor actinides are more radiotoxic but are not very mobile. Fission products, on the other hand, are less radiotoxic and can be found in mobile forms such as technetium-99, caesium-135 and iodine-129. The last column shows the content in the waste of the isotope to be transmuted for that element, e.g. caesium-135 for caesium.