The lines have been reported by
(1) M. A. Anderson and L. M. Ziurys,
1995, Astrophys. J. 444, L57.
For low N transitions hyperfine splitting due to the
1H nucleus may be resolvable. Therefore,
predictions at lower frequencies should be viewed with
some caution. The predictions should be quite reliable
at higher frequencies.
The dipole moment was taken from
(2) A. J. Marr, J. Perry, and T. C. Steimle,
1995, J. Chem. Phys. 103, 3861.
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