Electron paramagnetic resonance
Electron paramagnetic resonance (EPR) is a phenomenon where Electrons in a Magnetic field absorb Energy and transition between different energy states, which can be used to study the properties of materials. This technique is closely related to Nuclear magnetic resonance (NMR) and is used in various fields such as Chemistry, Physics, and Materials science. EPR spectroscopy is a powerful tool for characterizing the electronic structure of materials, particularly those with unpaired Electrons. It has applications in understanding the behavior of Free radicals, Transition metals, and other paramagnetic species. The technique involves measuring the absorption of Microwave radiation by a sample in a Magnetic field, which allows researchers to determine the Energy levels and Spin states of the electrons.