Experiment nr. 1

Electron-Paramagnetic Resonance (EPR)

Supervisor: Dr. Jürgen Vogt

The basics of the EPR are imparted with the help of a clear experimental setup. The
resonance effect is first measured on free radicals. From this first measurement one has to
determine the g-factor of the measured substances as well as the sensitivity of the

spectrometer. Furthermore the angular dependence ofthe EPR-lines of the paramagnetic
test ion Cr 3+sitting on places of axial crystal symmetry has to be measured and theoretically discussed.