Linear Molecule State

This contains the rotational constants and other information specific to each state within a linear molecule. Note that PGOPHER will calculate Hund's cases (a) and (b) exactly. Other cases can be handled, but typically require more work to set up. For Hund's case (c), for example it may make sense to treat the various components of a state separately, which is possible by setting up multiple copies of the state and making use of the OmegaSelect and/or ParitySelect settings. For example the two halves of a ²Π state can be treated separately by setting up two ²Π states, one with OmegaSelect = ½ and one with OmegaSelect = 3/2.