Emission spectra have been recorded for hot water at temperatures up to 1550 degrees C. Separate spectra have been recorded in the 800-1900 and 1800-2500 cm(-1) range. Assignments are made using a linelist generated from high accuracy, variational nuclear motion calculations, and energy differences. The spectra contain many hot bending transitions of the form (0n0)(0n-10), where states up to n = 6 have been assigned. Detailed analysis shows that the spectra contain lines from 34 separate vibrational bands including other hot bending transitions and the difference bands (030)-(100), (110)-(020), (011)-(020), (100)-(010), (040)-(110), (040)-(011), (120)-(030), (012)-(030), (011)-(100), (110)-(001), and (101)-(110), all of which have not been observed previously. From a total of 8959 lines recorded, 6810 have been assigned; 4556 of these lines are new. These spectra represent the first detection of the (060) vibrational band, for which a band origin of 8870.54 +/- 0.05 cm(-1) is determined. The (050) band origin is confirmed as 7542.40 +/- 0.03 cm(-1). The assignments extend the range of J and K-a values observed for the bending states, particularly for (050) and (060), where 63 and 27 different rotational levels, respectively, have now been observed; 53 frequencies given in HITRAN are corrected. (C) 1999 Academic Press.
|Number of pages||19|
|Journal||JOURNAL OF MOLECULAR SPECTROSCOPY|
|Publication status||Published - Jan 1999|
- HYDROGEN FLAME SPECTRA
- RO-VIBRATIONAL LEVELS
- COLLISIONAL LINEWIDTHS
- LINE POSITIONS