Seminar Details

Density Dependence of the Symmetry Energy with Emitted Protons and Neutrons

Daniel Coupland, NSCL
Thursday, April 5, 11:00 AM - Research Discussion
NSCL Lecture Hall

Determining the nuclear equation of state has been one of the long-term goals of the nuclear reaction community. Currently, the term with the largest uncertainty is the symmetry energy, which describes the energy difference between isospin symmetric nuclear matter and pure neutron matter. The density dependence of the symmetry energy plays a role in many aspects of nuclear reactions, structure, and astrophysics, ranging from understanding the thickness of the neutron skins on heavy nuclei to the maximum mass and radius relationship of neutron stars. As the sign of the symmetry potential is opposite for protons and neutrons, one promising probe to study the symmetry energy is the differing spectra of protons and neutrons emitted from heavy ion collisions. Little data actually exists on this observable, however, due to the complexity of detecting neutron energy spectra. I will describe a recent experiment that measured proton and neutron spectra from Sn + Sn collisions at the NSCL. Preliminary results will be compared to theory and previous data, where available.