Informing Neutron-Capture Rates through (d,p) Reactions on Neutron-Rich Tin Isotopes

Level energies and spectroscopic information for neutron-rich nuclei provide important input for r-process nucleosynthesis calculations; specifically, the location and strength of single-neutron $\ell=1$ states when calculating neutron-capture rates. Surman and collaborators have performed sensitivity studies to show that varying neutron-capture rates can significantly alter final r-process abundances. However, there are many nuclei important to the r-process that cannot be studied. Extending studies to more neutron-rich nuclei will help constrain the nuclear shell-model in extrapolating to nuclei even further from stability. The (d,p) reaction has been measured with radioactive ion beams of $^{126}$Sn and $^{128}$Sn to complete the set of (d,p) studies on even mass tin isotopes from doubly-magic $^{132}$ to stable $^{124}$Sn.