Crossed Laser and Molecular Beams Studies of Multiphoton Dissociation
In 1973, Canadian  and Russian  groups reported the observation of visible luminescence from C02 laser-irradiated molecular gases (SiF4, NH3, C2F3Cℓ) at powers well below the breakdown threshold. The extremely fast rise-time and the pressure-dependence of one part of the luminescence suggested that the molecules might be absorbing tens of photons required for dissociation under collisionless conditions. The demonstration of isotopic selectivity in the multiphoton dissociation (MPD) of a variety of molecules  supports this conclusion. The alluring possibility that MPD might lead to mode-selective bond breaking in molecules has also been suggested .
KeywordsExcess Energy Translational Energy Laser Energy Density Dissociation Channel Unimolecular Reaction
Unable to display preview. Download preview PDF.
- 5. (a)
- 5. (b)
- 6. (a)
- 6. (b)
- 8. (a)
- 8. (b)
- 10. (a)
- 10 (b).
- 13. (a)
- 13. (b)
- 14. (a)
- 14. (b)Aa. S. Sudbø, P. A. Schulz, E. R. Grant, Y. T. Lee, and Y. R. Shen, “Two-Center Eliminations in Multiphoton Dissociation”, submitted to J. Chem. Phys.Google Scholar
- 14. (c)Aa. S. Sudbø, P. A. Schulz, Y. R. Shen, and Y. T. Lee, “Three and Four Center Elimination of HCℓ in the Multiphoton Dissociation of Halogenated Hydrocarbons”, submitted to J. Chem. Phys.Google Scholar
- 15.P. A. Schulz, Aa. S. Sudbø, E. R. Grant, Y. R. Shen, and Y. T. Lee, “SF Multiphoton Dissociation by a Molecular Beam Method”, submitted to J. Chem. Phys.Google Scholar
- 17.P. J. Robinson and K. A. Holbrook, “Unimolecular Reactions” (Wiley, New York, 1972).Google Scholar
- 19.“Atlas of Mass Spectral Data” (Wiley, New York, 1969).Google Scholar