The PREX and CREX experiments at Jefferson Laboratory use parity violating electron scattering to cleanly locate neutrons in neutron rich nuclei. These measurements demonstrate that heavy nuclei have a neutron rich skin and measure its thickness. This determines the pressure of neutron rich matter and has important implications for the structure of neutron stars. We compare PREX and CREX results in the laboratory to neutron star observations with X-rays and gravitational waves.
The College of Arts