HeI photoelectron spectroscopic of microwave- discharged species of methyl iodide

The detection of the microwave-discharged species of methyl iodide by Hel photoelectron spectroscopy fUPS)is reported for the first time．The UPS spectra of l2 and HI molecules clearly indicate in the spectrum of microwave discharged species of methyl iodide．So the mechanism of the change of methyl iodide under microwave discharge proposed．The result provides the basis for understanding depletion of the ozone shell of the atmosphere by halogenated methane．