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1987-WG-02.jpg 188.6Kb JPEG image Thumbnail of THE $\nu_{3}$ SPECTRAL REGION OF $CS_{2}$: SPECTRA

Creators: Devi, V. Malathy; Guelachvili, G.; Benner, D. Chris; Rao, K. Narahari
Issue Date: 1987
Publisher: Ohio State University
Abstract: Two spectra of a natural isotopic sample of $CE_{2}$ have been obtained in the 1440 to $1560 cm^{-1}$spectral region with the high information Fourier transform spectrometer at Orsay. These spectra have a resolution of $0.0054 cm^{-1}$ and a signal to noise ratio of 1000. In addition, over 200 diode laser scans of portions of the most crowded region, 1494 to $1535 cm^{-1}$ were also obtained. These diode laser scans provide nearly complete frequency coverage in this region and have been obtained with both a natural isotopic sample and a sample enriched with the rarer isotopes. The signal to noise ratio of these seans is generally 1000 to 2000 and the resolution $0.003 cm^{-1}$. Position of isolated strong spectral lines on the FTS spectra can be measured with a precision of $0.00002 cm^{-1}$. These positions have been used to calibrate the frequency seales of the aiode laser spectra. The diodc laser scales are accurate to a precision of $0.0001 cm^{-1}$, being limited by how well the laser fringes can be fit. The two types of spectra compliment each other well. The broad frequency coverage and precise positions of the FTS spectra facilitate identification of the spectral lines and calibration of the frequency scales of the diode laser spectra. The diode laser spectra, on the other hand, resolve blends and, since the position measurements are not limited by the resolution of signal to noise, provide more accurate positions for weaker spectral lines.
Description: Author Institution: Physics Department, College of William and Mary; Laboratoire d'Infrarouge, Universit\'e de Paris-Sud; Department of Physics, Ohio State University
Other Identifiers: 1987-WG-2
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