Aggravated electron (EPR), a technique obvious material has unpaired electrons. Therefore, frequently, the ESR (resonance electron spin ) is also called. Experiment resonance para-magnetism, the electron EPR, etc. can be used for attract energy microwaves in the species of para-magnetism, by the transition spin one unpaired electron from one energy balance the energy balance the next in the presence of a powerful magnetic field defined . The first experience of EPR by in 1945 was done. EPR to two methods of pulsed and continuous done that here, continuous attention.