Frequency dependence of EPR signal-to-noise

¹Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, USA.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)

|September 10, 1999

Abstract:

Direct measurements of electron spin-echo signal and noise in well-characterized X-band and S-band spectrometers agree with predictions of frequency dependence based on first principles. For the particular spectrometers compared, the echo at 9.52 GHz was 9.5 times larger than the echo at 2.68 GHz, after scaling for differences in spectrometer gain. The calculated ratio was 7.6. This result contrasts with prior predictions that the frequency dependence would be much greater.

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