Detection System for Neutron $\beta$ Decay Correlations in the UCNB and   Nab experiments
  We describe a detection system designed for precise measurements of angular correlations in neutron $\beta$ decay. The system is based on thick, large area, highly segmented silicon detectors developed in collaboration with Micron Semiconductor, Ltd. The prototype system meets specifications for $\beta$ electron detection with energy thresholds below 10 keV, energy resolution of $\sim$3 keV FWHM, and rise time of $\sim$50 ns with 19 of the 127 detector pixels instrumented. Using ultracold neutrons at the Los Alamos Neutron Science Center, we have demonstrated the coincident detection of $\beta$ particles and recoil protons from neutron $\beta$ decay. The fully instrumented detection system will be implemented in the UCNB and Nab experiments, to determine the neutron $\beta$ decay parameters $B$, $a$, and $b$. 
L. J. Broussard and B. A. Zeck and E. R. Adamek and S. Bae{\ss}ler and   N. Birge and M. Blatnik and J. D. Bowman and A. E. ...
physics.ins-det nucl-ex