In many cutting-edge applications of electron paramagnetic resonance (EPR), signal intensities are low, which makes it challenging to obtain adequate signal-to-noise.  In rapid scan EPR the magnetic field is swept rapidly across the spectrum, which permits detection of the full amplitude of the signal and provides substantially improved signal-to-noise relative to conventional continuous wave (CW) EPR.  Litz wire coils and a rapid scan coil driver have been developed to implement the method as an accessory to a commercial spectrometer.  Deconvolution of the rapid scan signal provides the absorption spectrum.  Data will be shown for samples including nitroxide radicals in fluid solution or immobilized in solid matrices, spin-trapped radicals, defects in materials, and irradiated solids.

Rapid scan electron paramagnetic resonance improves sensitivity relative to conventional methods

249th National Meeting (2015)

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