As the nucleus is massive, recoil momentum of the atom may be neglected and the entire energy of the transition may be considered transferred to the Auger electron. As there is a single valence electron in Cr, the energy states may be thought of as given by the Bohr model.

The energy of the nth state En=-Z^{2}R1/n^{2} where R is the Rydberg constant and Z = 24.

The energy released in a transition from 2 to 1 is

The energy required to eject a n = 4 electron is E_{4}=Z^{2}R 1/16.

Thus the kinetic energy of the Auger electron is