Doppler-limited spectrum and analysis of the 3v/sub 3/ manifold of SiF/sub 4/

Journal Article · Thu Dec 31 23:00:00 EST 1981 · J. Mol. Spectrosc.; (United States)

DOI:https://doi.org/10.1016/0022-2852(82)90206-5· OSTI ID:5216726

Patterson, C W ^[1]; Pine, A S

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1. Los Alamos National Lab., NM

The two infrared-active vibrational bands of the 3v/sub 3/ manifold of SiF/sub 4/ were recorded at T approx. 155 K with Doppler-limited resolution using a tunable laser difference-frequency spectrometer. Although all branches of the l = 1 band were seen, only portions of the P branch of the weaker l = 3 band were recorded. Some 192 lines with J less than or equal to 36 have been fitted to a model Hamiltonian which allows the l = 1 and l = 3 bands to interact. This analysis allows us to determine the effective harmonic frequency, w/sub 3//sup 0/, and the three anharmonic coefficients X/sub 33/, G/sub 33/, and T/sub 33/ with high precision, so that the vibrational levels in the nv/sub 3/ ladder can be predicted accurately for several values of n. In contrast with SF/sub 6/, the l basis is found to be the best representation for the vibrational sublevels. 12 figures, 3 tables.

• OSTI ID: 5216726
• Journal Information: J. Mol. Spectrosc.; (United States), Journal Name: J. Mol. Spectrosc.; (United States) Vol. 96; ISSN JMOSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
400500* -- Photochemistry
DOPPLER EFFECT
ENERGY LEVELS
EXCITED STATES
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HARMONIC POTENTIAL
LASER SPECTROSCOPY
LOW TEMPERATURE
NUCLEAR POTENTIAL
POTENTIALS
SILICON COMPOUNDS
SILICON FLUORIDES
SPECTROSCOPY
VIBRATIONAL STATES