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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 500 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-29SiH3CN and
E-29SiH3CN.
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-29SiH3CN 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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