1. Prepare the crystallic sample.
2. Induce defects in the structure by irradiation, mechanical stimulus or chemical doping (this one is really available only during synthesis but is a valid method of introducing impurities into the crystal structure as well).
3. Collect the EPR spectra.
4. Determine their first order derivatives: dA/dB, where A – amplitude of the EPR signal, B – magnetic field induction.
5. The factor g is to be extracted from the Hamiltonian for the system.