# THE J=1-2 TRANSITION OF POTASSIUM HYDROXIDE

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 Title: THE J=1-2 TRANSITION OF POTASSIUM HYDROXIDE Creators: Raw, T.; Yamamura, T.; Gillies, C. W. Issue Date: 1985 Publisher: Ohio State University Abstract: A high temperature microwave spectrometer has been developed for the detection of KOH monomer in the vapor above alkali carbonate eutectics in fuel cell atmospheres. The microwave spectrum of KOH was investigated in the J=1-2 region around 32GHz at 580 C employing Stark modulation. Radio frequency-microwave double resonance techniques confirmed the assignment of the l-doublet vibrational states. A nonlinear least-squares fit of the partially resolved quadrupole hyperfine structure to a Lorentzian line shape yielded $\nu_{O} = 32834.33(5)$ MHz and $e^{O} q= -7.19(8)$ MHz for the ground vibrational state. These data are consistent with the higher J data and lead to a smaller uncertainty in $e^{O} q.^{1-3}$. Results for excited vibrational states will be discussed, as well as design features which have resulted in high spectrometer sensitivity for the detection of KOH. Description: $^{1}$P. Kuijpers, T. Torring, A. Dymanus Z. Naturforsch. 30a, 1256 (1975). $^{2}$E.F. Pearson, B.P. Winnewisser, M.B. Trueblood Z. Naturforsch. 31a, 1259 (1976). $^{3}$P. Kuijpers, T. Torring, A. Dymanus Z. Naturforsch, 32a, 930 (1975). Author Institution: Department of Chemistry, Rensselaer Polytechnic Institute; Department of Metallurgy, Tohoku University; Department of Chemistry, Rensselaer Polytechnic Institute URI: http://hdl.handle.net/1811/12257 Other Identifiers: 1985-TG-10