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The entry is a modification of the first entry from
July 2001. The main change is a significantly larger
dipole moment because of mixing between the two lowest
electronic states. The value is much better than
the ealier one, but should be taken with some caution.
The experimental lines were taken from
(1) M. C. McCarthy, C. A. Gottlieb, P. Thaddeus, M. Horn, and P. Botschwina,
1995, J. Chem. Phys. 103, 7820; and from
(2) W. Chen, S. E. Novick, M. C. McCarthy, C. A. Gottlieb, and P. Thaddeus,
1995, J. Chem. Phys. 103, 7828.
One line from (1) with large residuals was omitted from the line list.
Transition frequencies with calculated uncertainties exceeding
0.2 MHz should be viewed with caution.
The ab initio dipole moment is assumed to be the same as for the main isotopomer (e049503.cat).
The 1H hyperfine splitting is important only for very low N quantum numbers;
the 13C splitting may be resolvable even in the millimeter range.
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