Speaker
Description
The neutron-rich calcium isotopes have been a focus both experimentally and theoretically, as a key isotopic chain with clear examples of evolving shell structure and a test-bed for microscopically-based interactions and large-space $ab-initio$ calculations. While spectroscopy has extended quite far along the Ca isotopes, out to $^{56}$Ca at least, the evolution of single-particle occupancies has only been explored in detail to $^{50}$Ca through direct nucleon removal reactions. This can now be extended to $^{52,54}$Ca with the high-resolution array at RIBF, to explore both proton and neutron occupancies for the most neutron-rich Ca. We would like to propose spectroscopic factor measurements for both neutron and proton knockout on a solid Be target from $^{51,52,53}$Ca. This will allow us to explore the potential breaking of the $Z$=20 proton core, indicated by the change in charge radii in $^{50,52}$Ca relative to $^{48}$Ca, as well as the changing occupancies in the neutron sector as a function of isospin.
