Reference Label Details
Brix 1953P. Brix and G. Herzberg, J. Chem. Phys. 21, 2240-2241 (1953)
The Dissociation Energy of Oxygen
Brix 1954P. Brix and G. Herzberg, Can. J. Phys. 32, 110-135 (1954)
Fine Structure of the Schumann-Runge Bands Near the Convergence Limit and the Dissociation Energy of the Oxygen Molecule
note O2The values for D0 in Brix 1954 are given relative to the non-existent level v=0, N=J=0 of X 3Sigmag-. Also, the explicitly given D0 of 41260 +- 15 cm-1 has a "conservative" uncertainty. The origin of the value is from D0(o2,B 3Sigmau-) = 57127.5 +- 5 cm-1 going to O 3P2 and O 1D2, based on a Birge-Spooner extrapolation using v=0-21. Taking the term value of O 1D2 as 15867.862 cm-1 produces 41259.6 +- 5 cm-1 referred to v=0, N=J=0 of X 3Sigmag-. The lowest level of O2 X 3Sigmag- is N=0, J=1 (F1 term) of -1.783 cm-1 as obtained from constants in Huber 1979 and using Schlapp formulae for 3Sigma. However, this level does not exist on account of nuclear spin statistics of 16-O2, which wipes out all "negative" levels of X 3Sigmag-. The lowest existing level is therefore N=1, J=0 (F3 term) calculated from the same constants as -1.0857 cm-1. Cosby 1992 gives the actual term value for this level as -1.0857 cm-1. This increases D0 to 41261 +- 15 cm-1 or 41260.7 +- 5 cm-1. Note that Brix 1953 gives 41261 +- 15 cm-1. For some reason, CODATA Key Vals and other tables do not make this 1 cm-1 correction.