ROTATIONAL STRUCTURE OF THE 3800A ABSORPTION SYSTEM OF $SO_{2^{*}$
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Date
1956
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Ohio State University
Abstract
The geometry of the excited electronic state associated with the 3800A absorption system of $SO_{2}$ vapor has been recently determined by a quantitative application of the Frank-Condon $principle.^{(1)}$ The results reported are ${r}^{\prime}={r}^{\prime\prime}+0.060 1.492$A, and $2\theta^{\prime}=2\theta^{\prime\prime}-5^{\circ}4^{\prime}=124^{\circ} 36^{\prime}$. These data yield the constants of the rotational structure, namely $2\Delta({A}-{\bar{{B}}})=0.396$ $cm^{-1}$ and $2A\bar{B}=-0.071 cm^{-1}$. In order to check these results, and in order to remove the uncertainty as to the polarization of the bands of this $system,^{(2)(3)}$ the resolvable features of the rotational structure of the bands are being examined. Preliminary measurements yield $2\Delta({A}-{\bar{{B}}})=0.438+0.03$ $cm^{-1}$ and $2{\bar{{B}}}=-0.080+0.008$ $cm^{-1}$ confirming the results based on the Frank-Condon principle. Although the polarization of these bands has not yet been determined with certainty, it is expected that this can be reported soon.
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$^{*}$Supported by the Air Force Office of Scientific Research of the ARDC under contract No. AF18 (600) - 439. (1) M. L. Coffman, J. M. Corgan, C. M. Loyd, and J. B. Coon, Bull. Am. Phys. Soc. 1, 90 (1956) (2) N. Metropolis, Phys. Rev. 60, 283 (1941) (3) R. S. Mulliken, Rev. Mod. Phys. 14, 204 (1942)
Author Institution: Department of Physics, A. and M. College of Texas
Author Institution: Department of Physics, A. and M. College of Texas