Femtosecond polarisation spectroscopy of the vector correlations in the photodissociation of polyatomic molecules

Maxim F. Gelin; Alexander P. Blokhin

doi:10.1117/12.752396

9 July 2007 Femtosecond polarisation spectroscopy of the vector correlations in the photodissociation of polyatomic molecules

Maxim F. Gelin, Alexander P. Blokhin

Author Affiliations +

Proceedings Volume 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics; 67271S (2007) https://doi.org/10.1117/12.752396
Event: The International Conference on Coherent and Nonlinear Optics, 2007, Minsk, Belarus

Abstract

In order to adequately describe rotation of photofragments and dynamics of vector correlations in liquids, we have generalized the J-diffusion model by allowing the rotational relaxation rate to be angular momentum dependent. The calculated nonequilibrium rotational correlation functions (CFs) are shown to decay much slower than their equilibrium counterparts, and orientational CFs of hot photofragments exhibit coherent behavior, which persists for several rotational periods. In practical terms, the standard and generalized J-diffusion models are shown to be almost indistinguishable under equilibrium conditions. Far from equilibrium, their predictions may differ dramatically.

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Maxim F. Gelin and Alexander P. Blokhin "Femtosecond polarisation spectroscopy of the vector correlations in the photodissociation of polyatomic molecules", Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67271S (9 July 2007); https://doi.org/10.1117/12.752396

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