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The experimental lines are from
(1) M. C. McCarthy, C. A. Gottlieb, P. Thaddeus,
S. Thorwirth, and J. Gauss,
2011, J. Chem. Phys. 134, 034306.
Zeros as kilohertz digits got lost for the reported
transition frequencies. The reported value of
HKJ is too small by a factor of
1000.
The reported uncertainties appear to be conservative,
corresponding essentially to 2 σ values.
Nevertheless, predictions with uncertainties larger
than 0.3 MHz should be viewed with caution.
The data set is deemed to be sufficient for
observational purposes.
The dipole moment is from an ab initio
calculation by
(2) S. Thorwirth, J. Gauss, M. C. McCarthy, F. Shindo,
and P. Thaddeus,
2008, Chem. Comm., 5292.
At low temperatures, it may be necessary to discern between
ortho-H2SiS and para-H2SiS.
The ortho and para states are described by
Ka being odd and even, respectively.
The nuclear spin-weights are 3 and 1 for
ortho-H2SiS and para-H2SiS,
respectively. The
JKaKc =
111 is the lowest ortho state.
It is 5.9371 cm–1 above ground.
Separate
para and
ortho predictions are available up to
J = 12 and Ka = 3
along with separate
para and
ortho partition function values. Note:
the spin-weight of 3 for the separate ortho predictions
has been eliminated.
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