The initial value for the J" = 0
transition, employed in the first entry from
Sep. 2005 turned out to be off by almost
4 &sigma or almost 600 kHz.
The new, more accurate value was measured
by
(1) B. J. Drouin, S. Yu, J. C. Pearson, and H. Gupta,
2011, J. Mol. Struct., 1006, 2.
The J" = 1  3 transitions
were reported by
(2) L. Ulivi, P. de Natale, and M. Inguscio,
1991, Astrophys. J., 378, L29.
The J" = 6 transition
was taken from
(3) P. Essenwanger and H. P. Gush,
1984, Can. J. Phys., 62, 1680.
Infrared transitions were reported by
(4) N. H. Rich, J. W. C. Johns, and A. R. W. McKellar,
1982, J. Mol. Spectrosc., 95, 432.
The P(3) transition was omitted from the final fit.
Predictions should be viewed with caution above
J" = 8 in the ground vibrational state.
The excited state predictions should be viewed with
caution throughout because pressure shifts of a few tens
of megahertz in the infrared transitions may have a
nonnegligible effect.
The new ab initio dipole moment and its first
rotational correction have been derived from
(5) K. Pachuki and J. Komasa,
2008, Phys. Rev. A, 78, Art. No. 052503.
The rotationless value is in very good agreement with
experimental determinations employing intensity measurements
as well as other theoretical values. The older value of
0.000585 D is definitively incompatible with these
numbers. The experimental determinations are hampered
by large pressure shifts as well as by high pressure effects
on the intensities. The vibrational correction on the
dipole moment seems to be small and has been neglected
in the present calcultions.
The partition function takes into account both vibrational
states; nonnegligible individual contributions are given in
parentheses.
