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
.