For a free electron (g= 2.0023), using a field of 0.35 Tesla – 3500 Gauss resonance occurs at a frequency of 9.5 GHz. ( λ= 3.1 cm). This is in the microwave region, and precisely in the X-band (8-12 GHz) region.
The main parts of an EPR spectrometer are:
- The microwave source
- The magnet
- The cavity