Using (d,p$\gamma$) as a Surrogate for Neutron Capture with $^{75}$As

Arsenic is used as a radiochemical neutron fluence detector for nuclear reactions and other applications. The abundances of the residual isotopes $^{73,74}$As allow one to calculate the total neutron activity through (n,2n) or (n,$\gamma$) reactions along the isotopic network chain. The neutron capture reaction cross sections used for these calculations cannot be directly measured for the radioactive isotopes, but the (d,p$\gamma$) reaction as a surrogate for the (n,$\gamma$) reaction can be measured. An experiment at Oak Ridge National Laboratory using As beams in inverse kinematics and a deuterated target will first measure the $^{75}$As(d,p$\gamma$) reaction with stable beam to test the efficacy of our surrogate experimental techniques. With a tight geometry, eight ORRUBA silicon-strip detectors will detect recoil protons in coincidence with $\gamma$-rays detected by four high-purity segmented Ge clover detectors. Status and future goals for the As(d,p$\gamma$) surrogate campaign will be presented.