Frequency Dependence of EPR Signal-to-Noise

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, a...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) 1999-09, Vol.140 (1), p.218-227
Main Authors: Rinard, George A., Quine, Richard W., Harbridge, James R., Song, Ruitian, Eaton, Gareth R., Eaton, Sandra S.
Format: Article
Language:English
Subjects:
Electron Spin Resonance Spectroscopy - instrumentation
EPR
Equipment Design
ESR
frequency dependence
Mathematics
noise
S/N
Signal Processing, Computer-Assisted
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Summary: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.
ISSN:1090-7807
1096-0856
DOI:10.1006/jmre.1999.1798