Fig. A.1.
Energy level diagram for the lower transitions of A-type (left) and E-type (right) methanol. The quantum numbers are J, as marked on the right of each level in the diagram, and K, as given on the x-axis. The transitions observed by us are indicated by the lines, for which the color-code corresponds to the different tunings. We note that the ground state level of E-CH3OH lies 7.9 K above that of A-CH3OH.
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