Second-Derivative Line-Sharpening Device for Electron Paramagnetic Resonance

  • David E. Wood
Conference paper


A second-derivative line-sharpening device is described which is capable of reducing the apparent linewidth of an EPR signal by half. The principle of operation is field modulation at odd subharmonics of the second field modulation frequency. Accumulation of the sharpening terms in a CAT is found to greatly improve the signal-to-noise ratio of the sharpened spectra and to reduce the set-up time required.


Electron Paramagnetic Resonance Electron Paramagnetic Resonance Spectrum Electron Paramagnetic Resonance Signal Resolution Enhancement Electron Paramagnetic Resonance Absorption 
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  1. 1.
    Court L. Wolfe, Edmund C. Tynan, and Teh Fu Yen, unpublished work.Google Scholar
  2. 2.
    A. Hedberg and A. Ehrenberg, J. Chem. Phys. 48, 4822 (1968).CrossRefGoogle Scholar
  3. 3.
    Leland C. Allen, H. M. Gladney, and S. H. Glarum, J. Chem. Phys. 40, 3135 (1964).CrossRefGoogle Scholar
  4. 4.
    Sivert H. Glarum, Rev. Sci. Instr. 36, 771 (1965).CrossRefGoogle Scholar
  5. 5.
    Charles P. Poole, Jr., Electron Spin Resonance ( Interscience, New York 1967 ).Google Scholar
  6. 6.
    Gene E. Tobey, Electronic Design 4, 114 (February 15, 1967 ).Google Scholar

Copyright information

© Plenum Press, New York 1969

Authors and Affiliations

  • David E. Wood
    • 1
  1. 1.Department of Chemistry and Mellon InstituteCarnegie-Mellon UniversityPittsburghUSA

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