THE HIGH-RESOLUTION SPECTRUM OF THE $3\upsilon_{3}$ MANIFOLD OF $S_{1}F_{4}$
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Date
1982
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Ohio State University
Abstract
The infrared-active $\ell=1$ band of the $3\nu_{3}$ manifold has been recorded at T=160 K with Doppler-limited resolution using a tunable laser difference-frequency spectrometer. Most of the principal structure in the $\ell=1 P, O$, and R branches have been identified along with some overlapping structure in the weak $\ell=3$ band. About 180 lines with $J\leq 30$ have been fitted with a model Hamiltonian which allows the $\ell=1$ and $\zeta=3$ bands to Interact. The derived spectroscopic constants are in agreement with those of $\upsilon_{3}$. The three anharmonic coefficients $X_{33}, G_{33}$, and $T_{33}$ have been accurately determined so that the vibrational levels in the $n\upsilon_{3}$ ladder can be predicted accurately for several values of n.