โ Scribed by G. Weirauch; A.A. Kachanov; A. Campargue; M. Bach; M. Herman; J. Vander Auwera
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we reinvestigated the overtone spectrum of nitrous oxide ( 14 N 2 16 O) using intracavity laser absorption spectroscopy, observing seven new bands in the spectral range 10 650 -12 200 cm ฯช1 and improving the signal-to-noise ratio in two others previously reported using Fourier transform spectroscopy. The earlier FT line positions, in the range 6500 -11 000 cm ฯช1 , have been calibrated using the 3-0 vibration-rotation line wavenumbers in 12 C 16 O as references. A previously unreported hot band is spotted on the FT spectrum, at 7229 cm ฯช1 . Vibration-rotation parameters are provided for all newly analyzed bands and significantly improved for most previously reported FT bands by accounting for more lines in the fitting procedure than earlier. All bands are vibrationally assigned in agreement with theoretical predictions. A table listing all levels above 6500 cm ฯช1 reported in the literature is provided. ยฉ 2000 Academic Press
The ICLAS data were recorded at Grenoble, using an ICLAS spectrometer based on a Ti-sapphire laser. The intracavity cell was filled with nitrous oxide (purity: 99.99%) up to a maximum pressure of 46.9 Torr (61.7 hPa). The spectra were recorded with a generation time between 70 and 150 s. If we take into account the 34% filling ratio of the laser cavity by the absorber, this corresponds to an equivalent absorption path Supplementary data for this article are available on the journal home page (http://www.academicpress.com/jms) and as part of the Ohio State University Molecular Spectroscopy Archives (http://msa.lib.ohio-state.edu/jmsa_hp.htm).
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The intracavity laser absorption spectrum of H2 32S has been recorded near 13 200 cm-1 with an equivalent absorption pathlength of 25 km. The observed spectrum is assigned to the (50(+/-), v2 = 1) states constituting a local mode pair in strong H22-type interaction. The rovibrational analysis has al