In nuclear physics, secular equilibrium is a situation in which the quantity of a radioactive isotope remains constant because its production rate (e.g., due to decay of a parent isotope) is equal to its decay rate. An example of this is the germanium-68/gallium-68 generator commonly used for the preparation of gallium-68 radiopharmaceuticals for PET imaging.
In nuclear physics, secular equilibrium is a situation in which the quantity of a radioactive isotope remains constant because its production rate (e.g., due to decay of a parent isotope) is equal to its decay rate. An example of this is the germanium-68/gallium-68 generator commonly used for the preparation of gallium-68 radiopharmaceuticals for PET imaging.
Source: Wikipedia "Secular equilibrium" · CC BY-SA 4.0
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