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O2 Microwave Spectrum

Main Isotope

This shows an example of a microwave spectrum using a magnetic moment. The values are taken from G.Yu. Golubiatnikov and A.F. Krupnov, J Molec. Spectrosc. 225, 222 (2004), but with γH = 0, which gives a better fit to the experimental data. It gives good, but not exact agreement with their calculated values. The values calculated by PGOPHER have been checked against the explicit formulae given in Rouille at al, J Molec. Spectrosc. 154, 372 (1992) so the discrepancy is probably due to a slight difference in the method of calculation. Data file: o2fittedmuwave.pgo. Note the following:

18O16O

This is the microwave spectrum of the 18O16O species. The constants were obtained by fitting to the observed microwave lines given in the JPL  Molecular Spectroscopy catalog (H. M. Pickett, R. L. Poynter, E. A. Cohen, M. L. Delitsky, J. C. Pearson, and H. S. P. Muller, "Submillimeter, Millimeter, and Microwave Spectral Line Catalog," J. Quant. Spectrosc. & Rad. Transfer 60, 883 (1998)) λH was fixed to the value for 16O2.
Data file: o18ground.pgo Note the following differences:

17O16O

This is the microwave spectrum of the 17O16O species. The constants were obtained by fitting to the data from Fit to data from G. Cazzoli et al., Nuovo Ciminto 62, 243 (1981) obtained from the JPL  Molecular Spectroscopy catalog. The centrifugal distortion constants were fixed to the value for 16O2.

Data file: o17ground.pgo Note the following differences:

All isotopes

This file combines all the above. Data file: o2allground.pgo Note the following differences: