When I was at university about 25 years ago, QM was about electron transition energies, with QED being a refinement of that for things like fine structure. In experimental HEP you had QCD and quark gluon plasma which informs things like the LHC experiments at CERN.

IIRC nuclear physics was largely phenomenological with a lot of observations that had simple models fit to them without being able to reduce those to the particle physics models. This might be about establishing a link between the phenomenological nuclear models and the fundamental QM models.