PERTURBATION ANALYSIS IN THE ASUNDI SYSTEM $(a^{\prime 3}\Sigma^{+}\to a{^{3}}\Pi)$ OF $^{13}C^{16}O$) AND IN THE BALLIK-RAMASY SYSTEM $(b^{1}\Sigma^{-} \to a^{2}\Pi)$ OF $^{13}C_{2}, {^{12}}C^{13}C$
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Date
1986
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Ohio State University
Abstract
The molecules were produced by a microwave discharge through $^{13}C^{16}O$ or $^{13}C ^{16}O + {^{12}}C^{16}O$ mixtures. The spectra were recorded in Laboratoire Aim\'e Cotton (Orsay) by high resolution Fourier transferm spectroscopy. Very strong perturbations (greater than $10 cm^{-1}$) were deteceted during the rotational analysis of the Asundi system. The vibrational levels $v=0,1,3$, of the $a^{13}\Sigma^{+}$ state interact respectively with the $a^{3}\Pi v=4,5,6$, levels. The theoretical model we have used inculde second order spin-orbit and spin-rotation interactions parameters in order to reproduce the observed perturbed wavenumbers to the F.T.S. accuracy (about $0.003 cm^{-1}$). A similar work was performed for the Ballik-Ramsay system interactions. For the three molecules, about 11600 wavenumbers were reduce with a $0.003 cm^{-1}$ R.M.S. Accurate molecular constants and interaction parameters were $derived^{1,2}$. The variation of the electronic parameters with internulear distance will be discussed. $^{1}$ C. Amiot and K. Islami, J. Mol. Spectrosc. (to appear) 2 K. Islami and C. Amiot, J Mol. Spectrose. (to appear).
Description
Author Institution: Address of Amiot and Islami: Laboratoire de Physique Mol\'eculaire et Optique Atmosph\'erique, CNRS, B\^{a}t. 221, Campus d'Orsay, 91405 Orsay Cedex, France