Development of the large sensitive area 4H-SiC Schottky detectors at the Back-n

Abstract

In this paper, we report a 4H-SiC Schottky type detector with a large sensitive area (10 × 10 mm 2 and 8 × 8 mm 2) and a high energy resolution (0.79%@−40V). The pulse-height spectra were measured with a244Cm α source, and the charge collection efficiency (CCE) can reach 100% higher than −50 V. The Back-n is a high luminosity white neutron beamline at the China Spallation Neutron Source (CSNS). We used the 4H-SiC detector array to measure the nuclear data at the Back-n. This marks the first application of the 4H-SiC detector at Back-n. We measured the 6Li (n, t) 4He reaction products at 0°. The performances of the detectors kept unchanged after 27 h irradiation with neutron beam. The products of17O (n, α) 14C reaction were also measured from different angles. The detector array can clearly identify the α events band of this reaction.