Radiation that is capable of breaking apart molecules or atoms. The splitting or decay of unstable atoms typically emits ionizing radiation. To expose to ionizing radiation , usually in a nuclear reactor . Targets are irradiated to produce isotopes . Different forms of the same chemical element that differ only by the number of neutrons in their nucleus .
Most elements have more than one naturally occurring isotope.
Many more isotopes have been produced in nuclear reactors and scientific laboratories. The lightest metal and the third lightest element. Lithium-6 targets are irradiated to manufacture tritium . Any radioactive waste that is not spent fuel , high-level, or transuranic waste . Materials in inventory.