The experimental lines without ¹⁷O hyperfine splitting are from
(1) A. Dubrulle, J. Demaison, J. Burie, and D. Boucher, 1980, Z. Naturforsch. 35a, 471; and from
(2) A. V. Burenin, E. N. Karyakin, A. F. Krupnov, S. M. Shapin, and A. N. Val'dov, 1981, J. Mol. Spectrosc. 85, 1.
The ³³S hyperfine split 2 – 1 transition was taken from
(3) I. Merke and H. Dreizler, 1987, Z. Naturforsch. 42a, 1043;
and the corresponding 1 – 0 transition from
(4) J.-U. Grabow and W. Stahl, 1990, Z. Naturforsch. 45a, 1043.
Predictions beyond J = 60 should be viewed with some caution.
The ¹⁷O hyperfine splitting may be resolved for lower J transitions. Therefore, a separate hyperfine calculation up to J" = 5 is provided. The ¹⁷O spin multiplicity of 6 was considered in the calculation of the partition function !
The dipole moment was estimated from
(5) K. Tanaka, T. Tanaka, and I. Suzuki 1985, J. Chem. Phys. 82, 2835.