# PRELIMINARY OBSERVATIONS OF THE A-X SYSTEM OF THE CALCIUM MONOMETHOXIDE RADICAL: THE ORIGIN BAND

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 Title: PRELIMINARY OBSERVATIONS OF THE A-X SYSTEM OF THE CALCIUM MONOMETHOXIDE RADICAL: THE ORIGIN BAND Creators: Crozet, P.; Martin, F.; Ross, A. J.; Adam, A. G.; Dick, M. J. Issue Date: 2001 Publisher: Ohio State University Abstract: Laser excitation spectra of the $A ^{2}E \leftarrow X ^{2}A_{1}$ system of calcium methoxide were recorded at the University of New Brunswick. $CaOCH_{3}$ radicals were produced in a laser ablation source, using a 1.2 % mixture of methanol in He as a precursor. High resolution spectra were recorded in the range $15870-15985 cm^{-1}$ (F.W.H.M. 250 MHz) using a tunable, single-mode cw dye laser (CR $699 +$ autoscan), operating with DCM dye. The spectra exhibit bands assigned to the two spin-orbit components of the origin band $A ^{2}E_{3/2} \leftarrow X ^{2}A_{1}$ and $A ^{2}E_{1/2} \leftarrow X ^{2}A_{1}$. Resolved J and K structures are observed, and tentatively assigned by comparison with synthetic spectra generated from a Hamiltonian given in the $literature^{a}$ and spectroscopic $data^{bc}$ available for the electronic ground state. Description: $^{a}$X. Liu, C.P. Damo, T.-Y. D. Liu, S. C. Foster, P. Misra, L. Yu and T. A. Miller J. Phys. Chem 93 2266-2275 (1989) $^{b}$C. J. Whitham, S. A. Beaton, Y.Ito and J. M. Brown J. Mol. Spectrosc. 191 286-294 (1998) $^{c}$K. C. Namiki, J. S. Robinson and T. C. Steimle J. Chem. Phys. 13 5283-5289 (1998) Author Institution: B\^atiment A. Kastler, Universit\'e Lyon I, Domaine Scientifique de la Doua; Laboratoire de Spectrom\'etrie Ionique et Mol\'eculaire (UMR 5579 CNRS), B\^atiment A. Kastler, Universit\'e Lyon I, Domaine Scientifique de la Doua; Laboratoire de Spectrom\'etrie Ionique et Mol\'eculaire (UMR 5579 CNRS), University of New Brunswick; Department of Chemistry, University of New Brunswick URI: http://hdl.handle.net/1811/20321 Other Identifiers: 2001-WH-07