CPB Ljubljana 2018 course book

Particles – Mean Energy

Example:  - decay of 137 Cs  Photons

The emission weighted mean energy E mean

is defined as:





Ef

i

i

i

E





keV 4. 615

mean



f

i

Characteristic  -rays

i

f i is the intensity (or emission frequency) of the specific energy line E i and the sum is taken over all photon ray energies E i of the radionuclide spectrum.

f

E

i

i