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dc.creatorMcDowell, R. S.en_US
dc.creatorXu, Songlinen_US
dc.creatorSharpe, Steven W.en_US
dc.creatorKrohn, B. J.en_US
dc.descriptionAuthor Institution: Battelle Pacific Northwest Laboratory, Richland, WA 99352.; Los Alamos National Laboratory, Los Alamos, NM 87545.en_US
dc.description.abstractThe Femi-resonating bands $\nu_{3} (799 cm^{-1})$ and $\nu_{1} + \nu_{4} (774 cm^{-1})$ of $C^{35}Cl_{4}$ have been recorded using an FTIR spectrometer and static cell, and a tunable diode laser with a supersonically-cooled expansion. For $\nu_{3}$, quantum assignments were made for individual tetrahedrally-split transitions from P(20) to R(24) and for the partially-resolved Q branch. For $\nu_{1} + \nu_{4}$ a scalar fit was made to the P(38)-R(56) frequencies. In both cases the spectroscopic and molecular constants were derive. Some rather unexpected results from these analyses were clarified with FTIR spectra of the $\nu_{4}$ fundamental at $315 cm^{-1}$, The Coriolis constants $\zeta_{3} = 0.622$ and $\zeta^{\prime}_{4} = -0.143 (obtained from $\nu_{1}$ + $\nu_{4})$, though satisfying the sum rule, are perturbed by the Fermi resonance, and are inconsistent with intramolecular force fields previously reported based on isotope shifts in matrix spectra. The true Coriolis constant $\zeta_{4} = -0.38$, obtained from the unperturbed $\nu_{4}$ band, agrees well with these force fields, and with our own measurements of the $^{35}Cl - ^{37}Cl$ isotope shifts in $\nu_{4}$ certain systematics in the Coriolis constants of tetrahedral molecules will be discussed.en_US
dc.format.extent56030 bytes
dc.publisherOhio State Universityen_US

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