Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5430197 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2008 | 20 Pages |
The absorption spectrum of SO2 has been studied with 2Â MHz instrumental resolution in the wavenumber range 1315-1395cm-1, using a difference frequency spectrometer based on diode lasers for the 1300 and 1550Â nm telecom bands. Initially, Lorentz broadening parameters are determined, at pressures up to 400Â Pa, for 545 lines covering lower state J up to 60 and Ka up to 14. Using this information in conjunction with spectra recorded at 100 and 200Â Pa the line strength is subsequently determined for 395 lines of the (000)â(001) band of 32SO2, 170 lines from the (010)â(011) hot band of 32SO2, and 98 lines from the (000)â(001) band of 34SO2, and dipole moments are derived for all three bands. For the hot band, line positions of 178 transitions are measured and merged with previously published data to produce an improved set of Hamiltonian parameters for the (011) state, using the most recent model for (010).