Collisionless Multiphoton Dissociation of SF6: A Statistical Thermodynamic Process
An experiment, which combines picosecond CO2 laser pulses with opto-acoustic techniques, proves that the collisionles s multiphoton dissociation SF6 is a statistical thermodynamic process. The RRKM theory of unimolecular reactions, familiar to most physical chemists, provides a quantitative explanation of the dissociation effect. The reaction rate is primarily limited by transitions in the quasi continuum rather than by the anharmonicity of the first few discrete levels.
KeywordsOscillator Strength Ultrashort Pulse Discrete Level Vibrational Temperature Good Quantitative Agreement
Unable to display preview. Download preview PDF.
- 3.Proceedings of the Nordf.jord Conference on Tunable Lasers and Applications, ed. by A. M. Mooradian (Springer-Verlag, 1976).Google Scholar
- 4.See the article by R. V. Ambartsumyan in Ref. 3.Google Scholar
- 5.See the article by Kompa in Ref. 3.Google Scholar
- 6.See the article by N. Bloembergen, C. D. Contrell and D. M. Larsen in Ref. 3.Google Scholar
- 9.R. H. Pantell and H. E. Puthoff, Fundamentals of Quantum Electronics , (Wiley, New York, 1969).Google Scholar
- 11.P. Kolodner, C. Winterfeld and E. Yablonovitch, Opt. Comm. to be published.Google Scholar
- 15.W. H. Louisell, Quantum Statistical Properties of Radiation, (Wiley, New York, 1973).Google Scholar
- 17.P. J. Robinson and K. A. Holbrook, Uni-Molecular Reactions (Wiley, New York, 1972).Google Scholar
- 20.The departure from RRKM theory observed by D. F. Dever and E. Grunrwald, J. Am. Chem. Soc. 98, 5055 (1976) was probably due to the fraction, f, of molecules which were unable to overcome the “anharmonicity barrier”. A similar departure would be observed here if <n’> rather than <n’> were used to determine the vibrational temperature.CrossRefGoogle Scholar