INTENSITIES, SELF- AND AIR-BROADENING, AND PRESSURE-INDUCED LINE SHIFTS IN THE $2\nu_{2}$ BAND OF HCN

High-resolution infrared absorption spectra of HCN in the $2\nu_{2}$ band region near $1411 cm^{-1}$ have been recorded with the Bruker IFS 120 HR Fourier transform spectrometer located at Pacific Northwest National Laboratory. The measurements were all made at ambient temperatures between 24.7 and $24.9^{\circ}C$, although the variation during the course of recording each spectrum was less than $\pm 0.01^{\circ}C$. Two stainless steel absorption cells that were electroplated and gold coated to minimize reactivity were used to obtain the spectra; their path lengths were 0.958 and 19.95 cm. Four spectra of high-purity (99.8%) HCN together with three spectra of lean mixtures $({\sim} 3%)$ of HCN in dry air were simultaneously fit using a multispectrum nonlinear least squares $procedure.^{a}$ The analysis yielded room-temperature values for absolute intensities, self- and air-broadening coefficients and self-and air-induced pressure shift coefficients for numerous lines in the $2\nu_{2}$ band of $H^{12}C^{14}N$. Since there are no previous measurements of broadening and shift parameters in the $2\nu_{2}$ band, our results will be compared with values recently determined in the $\nu_{1}$ band of $H^{12}C^{14}N^{b}$ and with current HITRAN $values.^{c}$

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$^{a}$ D. Chris Benner, C. P. Rinsland, V. Malathy Devi, M. A. H. Smith and D. Atkins, JQSRT 53, 705-721 (1995). $^{b}$ C. P. Rinsland et al., JQSRT, in press (2003). $^{c}$ L. S. Rothman et al., JQSRT, in press (2003).
Author Institution: Department of Physics, The College of William and Mary; Atmospheric Sciences, NASA Langley Research Center; Mail Stop K8-88, Battelle Blvd., Pacific Northwest National Laboratory

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http://hdl.handle.net/1811/20951

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Abstracts of OSU International Symposium on Molecular Spectroscopy 2000-2009

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