HIGH RESOLUTION LASER SPECTROSCOPY OF THE $B^{2}\Sigma-X^{2}\Sigma$ SYSTEM OF SrOH AND SrOD
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Date
1978
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Publisher
Ohio State University
Abstract
Single mode cw dye laser excitation spectra of the $(0, 0^{0}, 0)--(0, 0^{0}, 0), (1, 0^{0}, 0)--(1, 0^{0},0),$ and $(0, 1^{1}, 0)--(0, 1^{1}, 0)$ bands of the 611-607 nm system of SrOH and SrOD have been observed and assigned. The spectra are consistent with a $^{2}\Sigma - ^{2}\Sigma$ system where the molecule is linear in both electronic states. The rotational analysis is obtained by measuring the P-R separations of the photoluminescence spectra of each feature in the dense and complex excitation spectra. The spectroscopic constants were obtained by fitting the $(0,0^{0}, 0)--(0, 0^{0}, 0),$, and $(1, 0^{0} 0)--(1, 0^{0}, 0)$ bands to the expressions for a $^{2}\Sigma- ^{2}\Sigma$ vibronic system, and the $(0, 1^{1}, 0)--(0( 1^{1}, 0)$ to a $^{2}\Pi - ^{2}\Pi$ vibronic band including $\ell$-type doubling. The linear structure of SrOH and SrOD in both electronic states and the B state spin-rotation constant are consistent with the picture, in the one-electron approximation, that the transition involves the promotion of the unpaired 5s electron to the 5p orbital on the strontium. Spectroscopic constants will be given.
Description
Author Institution: Department of Chemistry and Quantum Institute, University of California