Electric dipole matrix elements for vibration—rotation transitions in CO have been calculated using a computer program developed by Cooley for the solution of the radial Schrödinger equation. By means of this program four possible cubic dipole moment functions M(r) for CO were obtained from room-temperature measurements of the integrated intensities of the fundamental and first two overtone infrared bands. Relative measurements of rotational line intensities in the overtone bands indicate clearly that the most linear of these four functions is the correct one: M(r)=±0.112+3.11(r−re)−0.15(r−re)2−2.36(r−re)3D. (The internuclear separation r and its equilibrium value, re, are in angstroms.) Using this expression we find in the case of the overtone bands that there is an appreciable deviation of the vibrational matrix elements from the usual binomial expression, and that the matrix elements have a significant rotational dependence.
NATIONAL TECHNICAL INFORMATION SERVICEUSystematic measurements of the effect of temperature and salinity upon the circular depolarization will be undertaken shortly.Variability of the spectral attenuation of light in seawater indicates that a two-color Raman technique is not feasible for use in the ocean.The circular depolarization ratio is to be preferred, provided that light is not appreciably depolarized further during transmission through seawater.To check this, the depolarization of light scattered through small angles hat been measured in the laboratory, and found to be small but not negligible. Extrapolating the results to ocean conditions, we predict that I . these _ffects can be corrected for to the required accuracy provided that seax'ater eyhibits c fairly consistent relationship between depolarization and turbidity (which would be measured from the ln~ensity of the Raman return). Preparations arý2 now being made for field measurements of this relationship.
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