Jet-cooled diode laser spectrum and FTIR integrated band intensities of CF3Br: rovibrational analysis of 2 nu(5) and nu(2)+nu(3) bands near 9 mu m and cross-section measurements in the 450-2500 cm(-1) region

摘要

The high resolution (up to 0.0007 cm(-1)) infrared diode laser spectrum of CF3Br (Halon 1301) with natural isotopic abundance has been investigated in the region 1090-1130 cm(-1), characterized by the presence of the 25 and nu(2) + nu(3) absorptions and several weaker hot bands. The rovibrational analysis of the data, obtained employing a slit-jet system (rotational temperature of about 50 K) together with those recorded at 200 K, led to a complete and accurate set of spectroscopic constants for the bands of both the bromine isotopologues. Integrated band intensities have been obtained for all the absorptions in the spectral range 450-2500 cm(-1). The high resolution data and information concerning the cross-sections of this molecule can be useful for its remote sensing and for better modelling its contribution to global warming.