Molecule Types Symmetric Tops Transition Moments | <Prev Next> |

This must be used for multiphoton
or Raman transitions, and is also
appropriate for single photon transitions classified as parallel
or perpendicular, as noted below. The "Strength" number is the
value of the vibronic only matrix element:

Strength = <stateA| T(k,q) | stateB>

where k is the "Rank" and
q the "Component" setting,
normally chosen to be >= 0. This has selection rules Rank | Rank of transition: 1 for a normal electric dipole transition; see here for multiphoton or Raman transitions |

Component | Projection quantum number of transition moment. The default is auto, which for simple cases implies taking the only value of the component which gives an allowed transitions. In the standard one photon case it will be 0 for a parallel transition and 1 for a perpendicular transition. For more complicated cases auto will not work and the component must be specified. |

Strength | Transition (dipole) moment. For one photon transitions this has units of Debye. Note that the relative intensity is proportional to the square of this value. |