Experimental Determination of the 1 Sigma(+) State Electric-Dipole-Moment Function of Carbon Monoxide up to a Large Internuclear Separation

Experimental intensity information is combined with numerically obtained vibrational wave functions in a nonlinear least squares fitting procedure to obtain the ground electronic state electric-dipole-moment function of carbon monoxide valid in the range of nuclear oscillation (0.87 to 1.01 A) of about the V = 38th vibrational level. Mechanical anharmonicity intensity factors, H, are computed from this function for delta V + = 1, 2, 3, with or = to 38

``ANOMALOUS'' RO-VIBRATIONAL INTENSITIES IN THE ΔV=1\Delta V = 1 BANDS OF SH(X2Π)SH(X^{2}\Pi)

$^{1}$ J.B. Burkholder, P.D. Hammer, C.J. Howard, A.G. Maki, G. Thompson, and C. Chackerian, Jr., J. Mol. Spectrosc. 124, 137 (1987). $^{2}$ C. Chackerian, Jr., G. Guelachvili, A. Lopez-Pineiro. and R.H. Tipping, J. Chem. Phys. 90. 641 (1989). $^{3}$ D.D. Nelson, Jr., A. Schiffman, D.J. Nesbitt and J.D. Yaron, J. Chem. Phys. (to be published).Author Institution: Laboratoire d'Infrarouge, Universite de Paris-Sud.; Laboratoire d'Infrarouge, NASA-Ames Research CenterRelative line Intensities of p- and r- branch transitions of diatomic radical molecules (ClO, NH, OH) have recently1-3 been used along with the theory of the Herman-Wallis effect to obtain estimates of electric dipole vibrational transition moments. Of the first and second row diatomic hydrides, ab initio calculations predict SH to exhibit the largest H.W. effect. Indeed, our spectra confirm a very large effect, and we present here an attempt at a quantitative analysis of the Herman-Wallis intensity perturbation in SH