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The experimental millimeter and lower submillimeter
lines are from
(1) M. C. McCarthy, J. M. Vrtilek, E. W. Gottlieb, F.-M. Tao,
C. A. Gottlieb, and P. Thaddeus,
1994, Astrophys. J. 431, L127.
Additional lower frequency data with hyperfine structure
splitting were taken from
(2) Y. Hirahara, Y. Ohshima, and Y. Endo,
1994, J. Chem. Phys. 101, 7342.
The unpublished transition frequencies from (1)
were kindly provided by M. C. McCarthy.
The prediction should be reliable throughout. Caution
is advised for predictions higher than 400 GHz.
Greater caution is advised for the hyperfine splitting
in the higher 2Π3/2 component.
The 1H hyperfine splitting may be resolved for
lower J transitions. Therefore, a separate
hyperfine calculation up to J' = 9.5 is provided.
The 1H spin multiplicity of 2 was considered
in the calculation of the partition function !
The dipole moment is from an ab initio calculation
in (1). The value changes considerably with the level of
calculation and should thus be taken cautiously.
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