Self-broadened widths and frequency shifts of water vapor lines between 590 and 2400cm−1

This experimental study reports self-broadened linewidths and pressure-induced frequency-shifts of water vapor in the spectral region between 590 and 2400 cm−1. Over 1900 vibration–rotation transitions have been measured at 0.0054 cm−1 resolution using the Fourier transform spectrometer at Kitt Peak National Observatory. Self-broadening parameters have been obtained for the (000)–(000), (010)–(010), (010)–(000), (020)–(010), and (100)–(010) vibrational bands of H216O, H218O, and H217O. The observed widths range from 0.52 to 0.1 cm−1 atm−1, and the pressure shifts fall between ±0.05 cm−1 atm−1. The present linewidth coefficients are compared with previously measured and computed values given in the available literature. There have been no prior studies of self-broadened frequency-shifts of water vapor lines of this spectral region.