Absorption spectrum of deuterated water vapor enriched by 18O between 6000 and 9200 cm-1

The absorption spectrum of water vapor enriched by deuterium and oxygen-18 is analyzed in the 6000-9200 cm(-1) region. The spectrum has been recorded at room temperature with a Bruker IFS 120 h Fourier transform spectrometer. More than 14,000 absorption lines were measured in the recorded spectrum. The vibration-rotation assignments were performed on the basis of previously published experimental energies and of variational calculations. Nine water species ((H2O)-O-16, (HDO)-O-16, (D2O)-O-16, (H2O)-O-18, (HDO)-O-18, (D2O)-O-18, (H2O)-O-17, (HDO)-O-17 and (D2O)-O-17) were found to contribute to the observed absorption. More than 3600 lines of 19 vibrational bands of (D2O)-O-18 and about 4700 lines of 16 bands of (HDO)-O-18 with J as high as 19 and K-a as high as 11 were assigned. The main part of the (HDO)-O-18 and (D2O)-O-18 lines and all lines of (HDO)-O-17 and (D2O)-O-17 were observed in the laboratory for the first time. The obtained vibration-rotation energy levels are compared with previous experimental studies and the results of variational calculations. (C) 2012 Elsevier Ltd. All rights reserved.