Forbidden Transition Moment
This is very similar to the Spherical Tensor
Transition Moment, with the exception that there is no
restriction placed on the possible change in Σ (the
projection of S.) The only selection rule enforced is that
|ΔΩ| = Component. This type of transition
moment is required for some forbidden transitions, where the other
available types of transition moment give no transitions because
they enforce the selection rules too rigidly.
|Rank of transition.
|If this transition follows magnetic dipole selection
rules; must be set for any g-g or u-u
transitions, and clear for u-g transitions.
It affects the of the
|Transition moment. For one photon transitions this has
units of Debye if Magnetic is false, otherwise Bohr
magnetons. Note that the relative
intensity is proportional to the square of this value.