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Infrared Analysis of the Anharmonic Resonance between ν8+ ν9and the Dark State ν6+ ν7of HNO3

✍ Scribed by W.F. Wang; P.P. Ong; T.L. Tan; E.C. Looi; H.H. Teo

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
307 KB
Volume
183
Category
Article
ISSN
0022-2852

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✦ Synopsis

The high-resolution FTIR spectrum of the n 8 / n 9 band of HNO 3 around 1205 cm 01 has been measured and analyzed. The bright state was found to be strongly perturbed by its neighboring dark state n 6 / n 7 at the coincident levels. Taking account of the DK Å {2 anharmonic resonance, a simultaneous fit of n 8 / n 9 and n 6 / n 7 was performed leading to a good reproduction of the n 8 / n 9 band with a rms uncertainty of 0.00046 cm 01 . A set of rovibrational constants for n 8 / n 9 were accurately determined, while for n 6 / n 7 the rotational constant B and the band origin were obtained.

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