qspec.get_f  (  i ,  j  )[source]

All quantum numbers fulfilling $|I - J| \leq F \leq I + J$, where $F\in\mathbb{N}_0$.

Parameters:

iquant_like

The nuclear spin quantum number $I$.

jquant_like

The electronic total angular momentum quantum number $J$.

Returns:

outlist[quant]

All possible $F$ quantum numbers.