electron spin resonance

noun Physics.

the flipping back and forth between two spin directions of electrons in a magnetic field when electromagnetic radiation of the proper frequency is applied. Abbreviation: ESR
Also called electron paramagnetic resonance, spin resonance.

Origin of electron spin resonance

First recorded in 1950–55

Words nearby electron spin resonance

electron optics, electron pair, electron paramagnetic resonance, electron probe microanalysis, electron radiography, electron spin resonance, electron telescope, electron transport, electron tube, electron volt, electron-neutrino

British Dictionary definitions for electron spin resonance

electron spin resonance

noun

a technique for investigating paramagnetic substances by subjecting them to high-frequency radiation in a strong magnetic field. Changes in the spin of unpaired electrons cause radiation to be absorbed at certain frequencies Abbreviation: ESR See also nuclear magnetic resonance

Medical definitions for electron spin resonance

electron spin resonance

n.

A spectrometric method, based on measurement of the spins of unpaired electrons in a magnetic field, for detecting and estimating free radicals in organic reactions.