RAMAN SPECTROSCOPY OF GASES WITH A FOURIER TRANSFORM SPECTROMETER; THE RO-VIB SPECTRUM OF $D_{2}$

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 Title: RAMAN SPECTROSCOPY OF GASES WITH A FOURIER TRANSFORM SPECTROMETER; THE RO-VIB SPECTRUM OF $D_{2}$ Creators: Jennings, D. E.; Weber, A.; Brault, J. W. Issue Date: 1984 Publisher: Ohio State University Abstract: Raman spectra of gases have been recorded using a Fourier transform spectrometer. An argon-ion laser and multiple-pass Raman $cell^{1}$ were set up at the McMath FTS of the National Solar Observatory at Kitt Peak. The FTS was operated in the conventional manner, except that a photomultiplier was used as a detector. The cell was placed both inside and outside the laser cavity, and both laser polarizations were used. Spectra were recorded both with and without Rayleigh blocking filters. The technique was used to produce spectra of pure-rotation and rotation-vibration bands of $H_{2}, D_{2}, N_{2}, O_{2}, C_{2}H_{2}$, and $CO_{2}$ The technique has advantages over the use of conventional grating spectrometers in Raman spectroscopy because of the high throughput, wide spectral coverage, and high calibration accuracy of the FTS. In addition, the large dynamic range of the McMath FTS allows the Rayleigh line to be recorded without filtering. The spectrum of $D_{2}$ was used to measure the frequencies of seven pure-rotation transitions and nine rotation-vibration transitions. Signal-to-noise in the lines was as high as 150 after eight hours of integration, producing accuracies of a few milliwave-numbers. A rotation-vibration analysis of $D_{2}$ will be presented. Description: $^{1}$ A. Weber and J. Schlupf, J. Opt. Soc. Am. 62, 428 (1972). Author Institution: Infrared and Radio Astronomy Branch; National Bureau of Standards, Washington, DC 20234.; National Solar Observatory, 950 North Cherry Avenue URI: http://hdl.handle.net/1811/16698 Other Identifiers: 1984-RB-8