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Whereas the first entry from Apr. 2008 was limited to
the ground vibrational state, the present one takes
into account data associated with higher vibrational
states as well. Note that this entry contains
v = 3 – 5 ; two additional entries contain
v = 0 (047507) and v = 1 and 2
(047519) data.
The majority of the rotational data were taken
from
(1) S. Bailleux, M. Bogey, C. Demuynck, Y. Liu, and
A. Walters;
2002, J. Mol. Spectrosc. 216, 465.
Additional v = 0 data were provided by
(2) K. Kawaguchi, S. Saito, and E. Hirota;
1983, J. Chem. Phys. 79, 629.
Two v = 3 transition frequencies from (1) with
large residuals were omitted.
Also included were v = 1 – 0 data
from
(3) J. E. Butler, K. Kawaguchi, and E. Hirota;
1983, J. Mol. Spectrosc. 101, 161;
and from
(4) H. B. Qian;
1995, J. Mol. Spectrosc. 174, 599.
Two vibrational correction terms, the ground state
spin-orbit parameter and its second vibrational correction
were taken from
(5) R. D. Verma and S. R. Singhal;
1975, Can. J. Phys. 53, 411.
The set of spectroscopic parameters differs considerably
from that in (1).
Data with experimental uncertainties of 1 MHz
were not merged. The predictions should be reliable up to
1 THz and still reasonable at higher frequencies.
Concerning Hund's case a quantum numbers, levels with
J + 0.5 = N correlate with
2Π1/2 and levels with
J – 0.5 = N correlate with
2Π3/2 for J ≤ 11.5;
the correlation is reversed for J ≥ 12.5.
The ground state dipole moment was determined by
(6) H. Kanata, S. Yamamoto, and S. Saito,
1988, J. Mol. Spectrosc. 131, 89.
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