This is appropriate for a magnetic dipole transition moment carried by
the magnetic moment associated with the overall rotation of the
molecule. Note: This mplementation has
changed since 5.3.335, with the main change being the switch to units
of nuclear magnetons from Bohr magnetons.
Parameters
Strength
Rotational magetic moment in units of the Nuclear
magneton. Note that the relative intensity is
proportional to the square of this value.