| electron nuclear double resonance [i`lek´trän ¦nü·klē·ǝr ¦dǝb·ǝl `rez·ǝn·ǝns] SPECTROSCOPY A type of electron paramagnetic resonance (EPR) spectroscopy permitting greatly enhanced resolution, in which a material is simultaneously irradiated at one of its EPR frequencies and by a second oscillatory field whose frequency is swept over the range of nuclear frequencies. Abbreviated ENDOR. |