Column Descriptions
To get the quantum numbers click the molecular species.
No more than 500 lines are displayed at a time. Additional lines are stored
in a temporary file so that the lengthy search does not have to be repeated.
You can click the link near the top of the page to get these lines.
Note: They are only available for an hour, then the file is
deleted.
- Molecular Species
- This is the molecular species to which the data pertains.
- Frequency
- The observed transition frequency is given in megahertz.
- Unc.
- The estimated uncertainty is also given in megahertz. Note: Since
the maximum number of significant figures beyond the decmial point was fixed at
three for the transition frequency and two for uncertainties, in a few cases it
was necessary to round off the measured data. This situation occurs primarily
in the reproduction of molecular beam measurements. When uncertainties were not
given in the original source, an uncertainty was assigned on the basis of the
internal consistency of all the data available for the molecule in question. In
order to distinguish these from measured transitions, an asterisk (*) was
placed in front of the estimated uncertainty, which is twice the standard
deviation from the fit. If only an X appears, then it is to indicate that the
uncertainty is unknown.
