Journal of Physical Chemistry A, Vol.101, No.28, 5031-5034, 1997
2-Photon Photoelectron-Spectrum of Methyl-Iodide Through a Dissociative Intermediate State
The two-photon photoelectron spectrum of methyl iodide was recorded in a magnetic bottle time-of-flight spectrometer. As absorption of the first photon is resonant with the dissociative A-state continuum of methyl iodide, the experiment corresponds to a bound-free-bound transition. A progression in the C-I stretching vibration is observed, which corresponds, in a simplified picture, to the dissociation coordinate. The results agree well with recently published two-photon ZEKE spectra of CH3I. This similarity has impact on an ongoing discussion about discrepancies between calculated and measured intensities in two-photon ionization spectra.
Keywords:PHOTODISSOCIATION DYNAMICS;MULTIPHOTON IONIZATION;2-PHOTON IONIZATION;ENERGY;CH3I;SPECTROSCOPY;MOLECULES;ENHANCEMENT;LIFETIMES