MOLECULAR BEAM OPTICAL SPECTROSCOPY OF CALCIUM MONOCYANIDE
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Date
1992
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The 617.7 nm and 614.7 nm bands calcium monocyanide, CaNC/CaCN, have been recorded at very high resolution (FWHM $\sim$50 MHz) by supersonic molecular beam laser induced fluorescence (SSMB LIF). The experimental arrangement differs from that of the previous supersonic expansion LIF study in that products of the laser abaltion source was skimmed to produce a well collimated molecular beam and a cw-dye laser was used. The bands were analyzed as the $(0, 0, 0)A^{2}\Pi_{x}-(0, 0, 0)X^{2}\Sigma^{+}$ transition. The determined spectroscopic parameters are ($cm^{-1}): T^{\circ}0=16229.5417(26), B^{\prime}=0 13499(14), \gamma^{\prime}=6.1837(33)$, $A^{\prime}=77.6451(40)$, $B^{\prime}=0.15027(23)$, $A_{D}=2.69(11) \times 10^{-3}$, $D^{\prime}=-3.50(25)\times 10^{-5}$, $p^{\prime}=0.0754(18)$, $q^{\prime}=-0.04808(87)$, $q_{D}=2.64(65)\times 10^{-5}$. The anamolous values for the excited state parameters are proposed to arise from large Renner-Teller interactions. The permanent electric dipole moments were determined to be 5.949(1) D and 6.895(1) D for the A$^{2}\Pi_{1/2}$ and X$^{2}\Sigma^{+}$ states respectively.
Description
1. C.J. Whitham, P. Soep, J.P. Visticot and A. Kellerr, J. Chem. Phys. 92, 7012(1990).
Author Institution: Department of Chemistry, Arizona State University
Author Institution: Department of Chemistry, Arizona State University