More information on Emission of Electromagnetic Radiation (pdf-file)

Transition probability for -ray emission of electric (E ) and magnetic (M ) multipole quanta from an excited nuclear state into a lower-lying state :

Relation between the transition probablility and the reduced transition probability . are in units of , in MeV, ( are the nuclear level energies of the initial and final states,respectively), in , and in with .

Relation between the lifetime or half-life of an excited nuclear state and the transition probabilities :

One has to sum over all final states into which level can decay and over all multipoles in the transition . is the usual total -pole conversion coefficient.

Relation between the reduced transition probability
and the lifetime or half-life for
the **special case** of a pure E2 decay from an excited state to the ground state:

with and in sec, in MeV and B(E2) in .

Fri Feb 11 14:19:13 CET 2000