# INFRARED BANDS OF CYCLOPROPANE IN THE 3.2 $\mu$m REGION

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 Title: INFRARED BANDS OF CYCLOPROPANE IN THE 3.2 $\mu$m REGION Creators: Pliva, J.; Merdes, D. W.; Pine, A. S. Issue Date: 1992 Publisher: Ohio State University Abstract: The extremely perturbed parallel band system occurring in the infrared spectrum of cyclopropane between $\sim$ 3060 and $3150 cm^{-1}$ has been recorded with effective resolution of less than one half of the Doppler width using a differences-frequency laser spectrometer and subsequent deconvolution. The region of the strong Q-branches near $3101 cm^{-1}$ has also been measured with a color center laser and optothermal detection in a molecular beam adiabatically cooled to $\sim$ 10 K. Three distinct sequences of parallel subbands are observed belonging to the antisymmetric C-H stretching vibration $\nu_{6}$ of species A$_{a}$ in anharmonic plus $J_{z}$-Coriolis resonances with two perturbing states identified as the A$a/A$1 components of the combinations and $\Sigma_{2}+\nu^\mp_{11}+\nu^\pm_{14}$ and $2\nu^{2\pm}_{13}+\nu^{2\pm}_{14}$. A five-level Hamiltonian model has been used to interpret the observed spectrum and to adjust spectroscopic constants for the states involved and for their interactions. Additional local perturbations are observed in the spectrum. Description: Author Institution: Physics Department, The Pennsylvania State University; Applied Research Laboratory, The Pennsylvania State University; Molecular Physics Division, Gaithersburg, MD 20899 URI: http://hdl.handle.net/1811/12681 Other Identifiers: 1992-ME-09