electron spin resonance

noun

, Physics.

1. the flipping back and forth between two spin directions of electrons in a magnetic field when electromagnetic radiation of the proper frequency is applied. : ESR

electron spin resonance

noun

1. See nuclear magnetic resonance
   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 ESR See also nuclear magnetic resonance

Word History and Origins

Origin of electron spin resonance¹

First recorded in 1950–55