Definition: Isomeric transition is a form of radioactive decay where a gamma photon is emitted by a nucleus in an excited metastable state. The photon is emitted when the energy of the excited nucleus drops to the lower, ground state.
Isomeric transition does not alter the components of the parent nucleus, it only lowers the energy level.
Isomeric transition decay is denoted by the abbreviation: IT.
Also Known As: internal transition