VIBRATIONAL ANALYSIS OF NEW SPECTRA OF $3\nu_{3}$ OF $SF_{6}$ AND IMPLICATIONS FOB COLLISIONLESS MULTIPLE PHOTON EXCITATION MODELLING

Galbraith, H. W.; Ackerhalt, J. R.; Person, Willis B.; King, J.; Flicker, H.

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

Authors

Publisher

Ohio State University

Abstract

Recently $K i l d a l 1$ has measured the $3 ν 3$ absorption spectrum of $S F 6$ gas and some questions concerning the structure of $ν 3$ - overtones were reexamined by $F o x 2$ Because of the supposed importance of octahedral splitting as an aid In overcoming anharmonicities in multiple-photon excitation of $S F 6$ gas, we have re-measured the $3 ν 3$ absorption feature at $2830 c m −1$ at three temperatures. Our assignment of the ground state transitions supports the conclusions of Fox, and new vibrational anharmonicity constants were $o b t a i n e d 3$ Using this new vibrational model of $S F 6$ we show that rotational effects strongly dominate vibrational splittings in multiple photon excitation $e x p e r i m e n t s 4$

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 $3 v 3$ in $S F 6$ '', 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 $S F 6$ '', 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

URI

http://hdl.handle.net/1811/10348

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Abstracts of OSU International Symposium on Molecular Spectroscopy 1970-1979

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