The Electron Spin Resonance (ESR) : Principle Theory And Applications

Also known as…. Electron Paramagnetic Resonance (EPR) Electron Magnetic Resonance (EMR) What Is ESR???It is a branch of absorption spectroscopy in which radiation having frequency in microwave region is absorbed by paramagnetic substance to induce transition between magnetic energy level of electron with unpaired spin. Magnetic energy splitting is done by applying a static magnetic field. ESR Phenomenon Is Shown By …………..Atoms having an odd number of electrons. Ions having partly filled inner electron shells. Molecule that carry angular momentum of electronic origin. Free radicals having unpaired electrons. Molecule with paired electrons and zero magnetic field