15min:

V. MALATHY DEVI, D. CHRIS BENNER, Department of Physics, The College of William and Mary, Box 8795, Williamsburg, VA 23187-8795; M. A. H. SMITH, C. P. RINSLAND, Atmospheric Sciences, NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681-2199; S. W. SHARPE AND R. L. SAMS, Mail Stop K8-88, Battelle Blvd., Pacific Northwest National Laboratory, P. O. Box 999, Richland, WA 99352.

High-resolution infrared absorption spectra of HCN in the 2 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^\circC, although the variation during the course of recording each spectrum was less than \pm0.01^\circC. 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 ( 3%) of HCN in dry air were simultaneously fit using a multispectrum nonlinear least squares procedure. 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 ₂ band of H¹²C¹⁴N. Since there are no previous measurements of broadening and shift parameters in the 2 ₂ band, our results will be compared with values recently determined in the ₁ band of H¹²C¹⁴N and with current HITRAN values.