Intramolecular non-radiative transitions

Abstract

Non-radiative electronic transitions are discussed. The probability Wi of the electron staying in the initial state i is obtained as a function of the vibrational relaxation time, in both large and small molecules. The result at low temperature is where e is the vibrational relaxation rate, ħωm' is the energy difference of the levels which are involved in the transitions. An expression which depends on the phonon temperature is also obtained.