VIBRATIONAL ANALYSIS OF NEW SPECTRA OF $3\nu_{3}$ OF $SF_{6}$ AND IMPLICATIONS FOB COLLISIONLESS MULTIPLE PHOTON EXCITATION MODELLING
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Date
1978
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Publisher
Ohio State University
Abstract
Recently $Kildal^{1}$ has measured the $3\nu_{3}$ absorption spectrum of $SF_{6}$ gas and some questions concerning the structure of $\nu_{3}$- overtones were reexamined by $Fox^{2}$ Because of the supposed importance of octahedral splitting as an aid In overcoming anharmonicities in multiple-photon excitation of $SF_{6}$ gas, we have re-measured the $3\nu_{3}$ absorption feature at $2830\, cm^{-1}$ at three temperatures. Our assignment of the ground state transitions supports the conclusions of Fox, and new vibrational anharmonicity constants were $obtained^{3}$ Using this new vibrational model of $SF_{6}$ we show that rotational effects strongly dominate vibrational splittings in multiple photon excitation $experiments^{4}$
Description
$^{1}$ H. Kildal, J. Chem. Phys. 67, 1287 (1977). $^{2}$ K. Fox ``$3\nu_{3}$ Vibrational Spectra of $SF_{6}$ and $UF_{6}$'', accepted for publication in J. Chem. Phys. (1978). $^{3}$ J. R. Ackerhalt, H. Flicker, H. Galbraith, J, King and W. Person, ``The Analysis of $3v_{3}$ in $SF_{6}$'', submitted to J. Chem. Phys. (1978). $^{4}$ J. R. Ackerhalt and H. W. Galbraith, ``Collisionless Multiple Photon Excitation of $SF_{6}$: A Comparison of Anharmonic Oscillators With and Without Octahedral Splitting in the Presence of Rotational Effects'', submitted to J. Chem. Phys, (1977); H. W. Galbraith and J. R. Ackerhalt, ``Calculation of the Temperature Dependence of the Multiphoton Absorption Spectrum of $SF_{6}$'', submitted to J, Chem. Phys. (1977) W. B. Person has been on leave from Department of Chemistry, University of Florida, Gainesville, Florida, 32611.""
Author Institution: Los Alamos Scientific Laboratory
Author Institution: Los Alamos Scientific Laboratory