ANALYSIS OF A FERMI RESONANCE BETWEEN $\nu_{9} +\nu_{12}$ AND $\nu_{8} + 2\nu_{4}$ OF $C_{2}H_{6}{^{*}}$

$^{*}$Research supported by the Planetary Atmospheres program of the National Aeronautics and space Administration under Grant NGL-43-001-006. $^{1}$W. F. Rowe and E. B. Wilson, J. Mol. Spectrosc. 56, 163-165 (1975).Author Institution:A Fermi resonance between the $\nu_{9} + \nu_{12}$ and $\nu_{8} + 2\nu_{4}$ bands of $C_{2}H_{6}$ near $5\mu m$ has been analyzed. The analyzed method used the Hellman-Feynman theorem for the analytical determination of $\delta E/\delta\alpha$ where $\alpha$ is member of the set of molecular $parameters.^{1}$ The subband origins were fitted using non-linear least-squares techniques. The analysis method will be discussed in details and results reported for the states studied