Stimulated echo time domain electron nuclear double resonance

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Abstract
The observation of nuclear spin coherences in a pulsed electron nuclear double resonance (ENDOR) experiment is reported. The coherences are detected indirectly as time‐dependent modulations of the electron spin stimulated echo envelope. A theoretical description of these double resonance coherence experiments for spin systems coupled by nonsecular interactions is developed, and is employed to calculate the expected time domain signals assuming indirect detection of the nuclear coherences. The resolution and sensitivity of this technique is compared with other, related ENDOR techniques, and the prospects for more sophisticated time domain experiments are briefly assessed.

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