The experimental lines without ³³S hyperfine splitting are from
(1) A. V. Burenin, A. N. Val'dov, E. N. Karyakin, A. F. Krupnov, and S. M. Shapin, 1981, J. Mol. Spectrosc. 87, 312.
Predictions at low J and beyond J = 60 should be viewed with some caution.
The ³³S hyperfine splitting may be resolved for lower J transitions. Therefore, a separate hyperfine calculation up to J" = 15 is provided. The ³³S spin multiplicity of 4 was considered in the calculation of the partition function ! The ¹³C hyperfine splitting was not considered because even at J" = 1 – 0 it is very small.
The dipole moment was estimated from
(2) K. Tanaka, T. Tanaka, and I. Suzuki 1985, J. Chem. Phys. 82, 2835.