Analysis of linewidth

In addition to the different energy positions of the photolines shown in Fig. 2.4, the different heights of these lines are also a pronounced property of such spectra. It seems natural to use this height as a measure of the intensity of a photoline and, hence, for the cross section of a specific n/ orbital at the given photon energy. However, as will be seen in the next section, the appropriate quantity for the intensity is the area under a photoline (more correctly the dispersion corrected 

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Fe Q-band ENDOR study of the isotopically enriched Ni-C state of D. gigas and D. desulfuricans hydrogenases and Ni-B state of D. desulfuricans revealed a weak coupling between the Fe and the nickel atoms when the enzyme was in the Ni-A forms while no coupling was observed for the Ni-B form (186). A careful analysis of linewidth of Ni-A and Ni-B EPR signals detected in Fe enriched and nonenriched hydrogenase samples indicated that hyperfine interactions are lost in the spectral linewidth and, hence, nonde-tectable. 

INDO calculations of coupling constants. ) Assignment may be reversed. ) Determination of barrier to internal rotation by analysis of linewidth effects between 373 and 610 K. ... 

Determination of barrier to internal rotation by analysis of linewidth effects between 373 and 610 K. 

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