Endor Spectroscopy by Fourier Transformation of the Electron Spin Echo Envelope

  • W. B. Mims


The envelope of electron spin echoes1–3 is the function obtained by plotting the amplitude of the spin echo signal against the time between the echo-generating microwave pulses (see Figure 1). In this function, it is often possible to observe a periodic “modulation,” which can be shown to arise from superhyperfine structure (shfs) in the resonance line. The echo decay envelope is modulated by the “ENDOR” frequencies, and it is possible, by recording the echo envelope and then Fourier transforming the result, to obtain an ENDOR spectrum. We discuss here some of the advantages and also some of the problems of this form of “echo envelope spectroscopy.”


Electron Spin Modulation Pattern ENDOR Spectrum Fourier Cosine Time Waveform 
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Copyright information

© Springer Science+Business Media New York 1982

Authors and Affiliations

  • W. B. Mims
    • 1
  1. 1.Bell LaboratoriesMurray HillUSA

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