DIODE LASER INTENSITY AND LINE WINTH MEASURENENTS IN THE $\nu_{1}$ AND ADJACENT ABSORPTION BANDS OF $N_{2}O$

Author Institution:The intensities of individual rotation-vibration absorption lines of nitrous oxide $(N_{2}O)$ have been measured in the region $1210 cm^{-1}$ to $1320 cm^{-1}$ with a diode laser spectrometer. These include lines in the P and R branches of the fundamental $(10^{\circ}0-00^{\circ}0)$ band of both isotopic species $^{14}N_{2} ^{16}O$ and $^{14}N_{2} ^{18}O$, lines in the hot bands $(11^{le}0-01^{le}0)$ and $(11^{1f}0-01^{1f}0)$ of $^{14}N_{2} ^{16}O$, and several lines of the R branch of the $(02^{\circ}0-00^{\circ}0)$ overtone band of $^{14}N_{2} ^{16}O$. These measurements were made at pressures 0.5 torr to 12 torr, resulting in line widths which were typically $3\times 10^{-3}$ $cm^{-1}$. The spectra were recorded in digitized form and least-squares fit to a Voigt line profile. The individual line intensity measurements were then combined in a least-squares fit to obtain an integrated band intensity which will also be presented along with our estimate of the uncertainties The self-broadening of most of these lines has been measured. Measurements will be made of pressure broadening by $N_{2}$