Knowledge Bank

We have recorded high-resolution absorption spectra of ozone broadened by dry air at several temperatures between $+23\circ C$ and $-63\circ C$ using the Fourier transform spectrometer at the McMath-Pierce facility of the National Solar Observatory on Kitt Peak. The spectra cover the region from approximately $600cm-1$ to $2700cm-1$ at a resolution of $0.005cm-1$. Broadening gas pressures varied from approximately 100 to 250 Torr. From these spectra we have determined air-broadening and line shift coefficients and their temperature dependences for a number of lines in the $\nu 1$ band. The broadening results are compared with previous measurements of the temperature-dependence of $N2-$ and $O2-$broadening coefficients in the $\nu 3$ $band1-2$. Analysis of additional lines in the $\nu 1,\nu 2$, and $\nu 1+\nu 3$ bands is in progress.