The experimental frequencies have been reported
by
(1) A. V. Kryvda, V. G. Gerasimov, S. F. Dyubko,
E. A. Alekseev, R. A. Motiyenko,
2009, J. Mol. Spectrosc. 254, 28.
Additional microwave transitions were also considered.
These were taken from
(2) M. Stubgaard, PhD thesis,
1978, Københavns Universitet.
Claus Nielsen and Matt Johnson are thanked for
providing the data from (2).
Apr. 2013:
The data from (2) have been merged as far as they
did not display hyperfine structure. In addition,
the correct partition function values are provided here.
Several higher order distortion terms have been estimated.
Predictions with uncertainties larger than 0.3 MHz
should be viewed with caution. It is conceivable that the
predictions are accurate enough for astronomical observations.
14N hyperfine splitting may be resolved
for low values of J. Therefore, a
separate hyperfine calculation is provided for
J" = J' ≤ 10 and
frequencies below 100 GHz along with
partition function values.
Vibrational contributions to the partition function
will be provided.
The dipole moment was assumed to agree with that
of the main isotopolog, which was determined
by
(3) R. J. Kurland and E. B. Wilson,
1957, J. Chem. Phys. 27, 585.
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