Atomic Multiplets

Calculate term symbols given occupations in two angular momentum shells. How to do this is nicely described in Inka Locht's PhD thesis, see link here.

Hund's rule ground state is calculated.

Using dipole selection rules: $\Delta J = \pm 1$ or $\Delta J=0$, if $J>0$, the number of possible transitions from the Hund's ground state to core-excited states are calulated.