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Very accurate microwave data were published by
(1) M. C. McCarthy, K. L. K. Lee, J. P. Porterfield,
P. B. Changala, and A. K. Eckhardt,
2021, Mol. Phys. 119, Art. No. e1975052.
Starting spectroscopic parameters were taken
from the main isotopic species, see e070503.cat.
The calculations should be accurate enough for observations
in cold sources. Ka = 0 and 1 may be
reliable enough up to the 3 mm region. Transitions involving
higher Ka should be viewed with
increasing caution.
Please note that C1 is so close to the center of mass
that transitions of this isotopolog are likely buried under
transitions of the main isotopic species.
At low temperatures, it may be necessary to discern
between ortho-H2C213CS
and para-H2C213CS.
The ortho states are described by Ka odd,
the para states by Ka even.
The nuclear spin-weights are 3 and 1 for
ortho-H2C213CS and
para-H2C213CS, respectively.
The JKaKc =
111 level is the lowest ortho level.
It is approximately 9.6 cm–1 above ground.
The dipole moment was taken from the main isotopolog.
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