Self-Focusing In SF6

J. R. Ackerhalt; H. W. Galbraith

doi:10.1117/12.932046

30 December 1981 Self-Focusing In SF₆

J. R. Ackerhalt, H. W. Galbraith

Proceedings Volume 0288, Los Alamos Conf on Optics '81; (1981) https://doi.org/10.1117/12.932046
Event: Los Alamos Conference on Optics, 1981, Los Alamos, United States

Abstract

We show by explicit calculation of our previously published quasicontinuum model that the molecular susceptibility rapidly approaches zero as higher excited states of the molecule become populated. Hence the overtones of the ν₃-pumped mode are totally responsible for the self tocusing effects in SF₆. We explicitly calculate the ν₃ ladder contribution to the susceptibility. Our vibrational model is a classical triply degenerate anharmonic oscillator in the Cartesian basis with the anharmonicity parameters chosen to be consistent with the latest spectroscopic analysis of the 3ν₃ overtone spectrum. The rotational struc-ture is represented by a distribution of these oscillators where the distribution is chosen to correspond to the spectrum of the ν₃ fundamental. We find good agreement with the 300K self-focusing data of Nowak and Ham at CO₂ P(28), P(20) and P(10) in SF₆.

Citation Download Citation

J. R. Ackerhalt and H. W. Galbraith "Self-Focusing In SF₆", Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); https://doi.org/10.1117/12.932046

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