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Electron paramagnetic resonance (EPR) or electron spin resonance (ESR) spectroscopy is a method for studying materials that have unpaired electrons.The basic concepts of EPR are analogous to those of nuclear magnetic resonance (NMR), but the spins excited are those of the electrons instead of the atomic nuclei.
Pulsed electron paramagnetic resonance (EPR) is an electron paramagnetic resonance technique that involves the alignment of the net magnetization vector of the electron spins in a constant magnetic field. This alignment is perturbed by applying a short oscillating field, usually a microwave pulse.
An EPR spectrometer used for spin-trapping technique. Spin trapping is an analytical technique employed in chemistry [1] and biology [2] for the detection and identification of short-lived free radicals through the use of electron paramagnetic resonance (EPR) spectroscopy.
Electron nuclear double resonance (ENDOR) is a magnetic resonance technique for elucidating the molecular and electronic structure of paramagnetic species. [1] The technique was first introduced to resolve interactions in electron paramagnetic resonance (EPR) spectra.
In magnetic spectroscopy (EPR, NMR), a microwave pulse (EPR) or a radio frequency pulse (NMR) in a strong ambient magnetic field is used as the energizing event. This turns the magnetic particles at an angle to the ambient field, resulting in gyration.
The doubts were dispersed when Zavoisky visited Moscow, assembled an EPR spectrometer from scratch and reproduced his results there. [3] In 1945, Zavoisky defended his habilitation on the phenomenon of electron paramagnetic resonance. [4] [13] [14]
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