While this form of transition moment is more appropriate for asymmetric tops, as it allows transition
moments to be set along the a, b, or c inertial axes, it can also be used for symmetric tops.
Settings
Rank
Rank of transition - 1 for a normal
electric dipole transition.
Axis
Axis of transition moment - a, b or c. The two axes perpendicular to the symmetry axis will be equivalent.
Parameters
Strength
Transition (dipole) moment. For correct absolute intensities
this should be given in units of units of Debye. Note that the relative
intensity is proportional to the square of this value.