File:EPR multifrequency spectra.png

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EPR_multifrequency_spectra.png ‎(585 × 181 pixels, file size: 1 KB, MIME type: image/png)

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Description EPR spectra of a nitroxide radical as a function of frequency. At 9 GHz the triplet splitting is a powder-pattern shape corresponding to the hyperfine interaction of electron spin (s=1/2) with nitrogen (I=1). The g-anisotropy is unresolved at 9 GHz but starts contributing more and more with increasing frequency. At 95 GHz and above, the right triplet is the remainder of the nitrogen hyperfine interaction whereas the left two lines originate from gxx and gyy components. The nitrogen hyperfine interaction is rather anisotropic in this case, so only the Azz, but not the smaller Axx and Ayy components are resolved.
Source Original JPEG: http://en.wikipedia.org/wiki/File:EPR_multifrequency_spectra.jpg
Author Original JPEG: http://en.wikipedia.org/wiki/User:Astrochemist
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