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The experimental data were taken from
(1) D. Priem, J. Cosléou, J. Demaison, I. Merke,
W. Stahl, W. Jerzembeck, and H. Bürger,
1998, J. Mol. Spectrosc. 191, 183.
The predictions should be reliable throughout.
Transitions above 450 GHz or with higher
values of K should be viewed with caution.
14N hyperfine splitting was resolved in
laboratory measurements, but are deemed to be unimportant
for astronomical observations.
Note:
At low temperatures, it may be necessary to discern
between A-SiH313CN and
E-SiH313CN.
The A state levels are described by
K = 3n, those of E state
by K = 3n ± 1.
The nuclear spin-weight ratio is 2 : 1 for
A-SiH313CN with
K > 0 and all other states, respectively.
The dipole moment was assumed to agree with the one of
the main isotopolog.
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