Cross Section Measurement of $^2$H(n,np)n at 16 MeV in Symmetric Constant Relative Energy Configurations

We have made cross-section measurements of neutron-deuteron breakup at an incident neutron energy of 16 MeV. The scattered proton was detected in coincidence with one of the neutrons and their energies were determined via time-of-flight techniques. Target-beam luminosity is obtained from n-d elastic scattering performed concurrently with the main experiment by detecting the scattered deuteron. Our current measurements are of two special cases of the Symmetric Constant Relative Energy Configuration: the space-star and the coplanar star. Data are compared with theoretical predictions [1] through Monte Carlo calculations which smear point geometry predictions over the finite beam, target, and detectors. Preliminary results for the space star are in agreement with previous experimental measurements [2] and are at least 20\% larger than theoretical predictions. \\[4pt] [1] H Witala and W Gl\"{o}ckle. J. Phys. G: Nucl. Part. Phys. 37 064003 (2010). \\[0pt] [2] C.R. Howell, Nucl. Phys. A 689, 298c (2001).