Abstract
Experimental and theoretical evidence suggests that inner-shell lifetimes for carbon, nitrogen, and oxygen depend on the chemical form of the element in question. The changes in lifetime widths are small and are difficult to measure using traditional inner-shell spectroscopic methods. For some molecules lifetime-vibrational interference produces pronounced distortions of the deexcitation spectra that result from the decay of core holes. To see whether these effects could be useful in determining inner-shell lifetimes, we have calculated theoretical electron emission spectra for the deexcitation of core-excited O 2 to the ground electronic state of O + 2. These calculations show that the shape of the emission spectrum is very sensitive to the lifetime and that it should be possible to make reasonably accurate measurements of the lifetime from such deexcitation spectra even under very low resolution in both the entrance and exit channels.
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