Mathematics – Probability
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jqsrt..62..181s&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 62, issue 2, pp. 181-191
Mathematics
Probability
2
Molecular Oxygen: Transition Probabilities, Molecular Oxygen: Line Broadening
Scientific paper
Spectral line parameters and the Einstein transition probability of the b1Σg+(ν=0)←X3Σg-(ν=0) band (A band) of the 16O18O isotopomer of molecular oxygen were determined from high-resolution Fourier transform absorption spectra of pure oxygen at pressures between 80 and 1000 hPa. The spectra were recorded at room temperature and 198 K, and at absorption pathlengths between 64.75 and 144.7 m. The spectrometer resolution varied from 0.0069 to 0.029 cm-1. Line positions, integrated line intensities and pressure-broadening coefficients for broadening by 16O2 were retrieved using a least-squares line-fitting procedure. Though the line positions remained uncalibrated, improved spectroscopic constants for the upper state were determined. The individual intensity data from all spectra were combined and averaged line intensities with an accuracy of better than 10% and pressure-broadening coefficients with errors of less than 25% were derived for most of the lines. The broadening coefficients were found to be approximately (76±4)% of the corresponding self-broadening coefficients of the 16O2 isotopomer. Combining the individual observed line intensities in an intensity analysis, the Einstein transition probability for the A band of 16O18O was determined.
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