|
The transition frequencies were reported by
(1) H. S. P. Müller, A. Belloche, F. Lewen, and S. Schlemmer,
2026, ACS Earth Space Chem. 10, 578.
The measurements were carried out employing a sample
highly enriched in 13CH3CN.
The
experimental line list can be accessed with source codes.
The purely K-dependent terms A and
DK were assumed to agree with
those of the main isotopolog, see e041505.cat.
The transition frequencies should be viewed with caution
if the calculated uncertainties exceed 0.1 MHz.
The partition function values below refer to the ground
vibrational state only.
Vibrational correction factors have been derived
in the harmonic approximation.
At low temperatures, it may be necessary to discern between
A-13CH3C15N and
E-13CH3C15N.
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-13CH3C15N with
K > 0 and all other states, respectively.
The JK = 11
level is the lowest E state level.
It is 5.5622 cm–1 above ground.
The dipole moment was assumed to agree with
the one of CH3C15N
reported by
(2) A. Mito, J. Sakai, and M. Katayama,
1984, J. Mol. Spectrosc. 103, 26.
|
