Knowledge Bank

High-resolution infrared absorption spectra of HCN in the $2\nu 2$ band region near $1411cm-1$ 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 $H12C14N$. 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 $H12C14Nb$ and with current HITRAN $values.c$