The 1 – 0 lines were taken from
(1) W. Lin, S. A. Beaton, C. J. Evans, and M. C. L. Gerry, 2000, J. Mol. Spectrosc. 199, 275.
The centrifugal distortion constant was published in
(2) M.-A. Lebault-Dorget, C. Effantin, A. Bernard, J. d'Incan, J. Chevaleyre, and E. A. Shenyavskaya, 1994, J. Mol. Spectrosc. 163, 276.
In the laboratory, ⁴⁵Sc and ¹⁹F hyperfine splitting was resolved. However, since only the former will be resolvable in the ISM or CSM at low values of J, only the unsplit frequencies have been predicted. Predictions with hyperfine structure are also available. The predictions should be viewed with caution because of the limited data available. The partition function does not consider the hyperfine effects !
The dipole moment is from an ab initio calculation in
(3) S. R. Langhoff, C. W. Bauschlicher, Jr., and H. Partridge, 1988, J. Chem. Phys. 89, 396.