![]() Principles of Electron Spin Resonance Ellis Horwood: Chichester, 1993. Large variations due to spin-orbit coupling and zero-field splitting.Typically close to free- electron value.Measured from the center of the signal.In the presence of a magnetic field, the two electron spin energy levels are: E = gmBB0MS g = proportionality factor mB = Bohr magneton MS = electron spin B0 = Magnetic field quantum number (+½ or -½).For a molecule with one unpaired electron.Based upon the spin of an electron and its associated magnetic moment.Spectra When phase-sensitive detection is used, the signal is the first derivative of the absorption intensity Cradock, Stephen Structural Methods in Inorganic Chemistry CRC Press: Boca Raton, 1987. What causes the energy levels? Resulting energy levels of an electron in a magnetic field Ebsworth, E. ![]() Required frequency of radiation dependent upon strength of magnetic field. ![]()
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