Particle-$\gamma$ Coincidence Measurements of Neutron Transfer Reactions on Neutron-rich Nuclei

Neutron-transfer measurements with (d,p) reactions provide important nuclear structure information such as excitation energies, angular momenta and spectroscopic strengths for neutron single-particle states. Such information can also be used to inform neutron-capture rates for nuclei far from stability, where direct measurements of the (n,$\gamma$) reaction are not possible because of the short life-times. In particular, neutron-capture measurements on neutron-rich nuclei are important for understanding astrophysical phenomena such as $r$-process nucleosynthesis. Using inverse kinematics for (d,p) reactions enables neutron-transfer measurements to be made using beams of neutron-rich nuclei, which cannot be made into targets. Measurements of $\gamma$-rays using high-resolution $\gamma$-ray detectors in coincidence with (d,p) reaction protons enables more accurate energy determination of excitations and provides further information on $\gamma$-ray strengths, which are important when extracting direct contributions to neutron-capture rates. Prospects for (d,p$\gamma$) measurements in inverse kinematics with neutron-rich beams at the HRIBF at ORNL will be discussed.