Self-broadened widths and frequency shifts of water vapor lines between 590 and 2400 CM-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 (H2O)-O-16, (H2O)-O-18, and (H2O)-O-17. 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. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.