Electron Paramagnetic Resonance Spectrometer

EPR is the only research method that can directly track unpaired electrons, providing in situ and non-destructive information on microscopic scales such as electrons, orbits and nuclei. If the electromagnetic wave with frequency v satisfies the condition of hv=gβH in the direction perpendicular to H, the electrons at the low energy level will absorb the energy of the electromagnetic wave and transit to the high energy level, which is the electron paramagnetic resonance. EPR can only study paramagnetic substances.