ABSTRACT
In nuclear physics research a number of new directions has been developed during the last few years. An important domain is intermediate energy nuclear physics, where nucleons and eventually nucleon substructure is studied using high-energy electrons, as ideal probes, to interact in the nucleus via the electromagnetic interaction (Box 16a). It has become clear that the picture of the nucleus as a collection of interacting nucleons is, at best, incomplete. The presence of non-nuclear degrees of freedom, involving meson fields, has become quite apparent. Also, the question whether nucleons inside the nucleus behave in exactly the same way as in the ‘free’ nucleon states has been addressed, in particular by the European Muon Collaboration (EMC) and the New Muon Collaboration (NMC), with interesting results being obtained, in particular, at CERN. These various domains, once thought of as being outside the field of nuclear physics have now become an integral part of recent attempt to the nucleus and the interactions of its constituents in a broader context.
