Double-Differential Cross Section Measurement With Low Threshold Detector For Proton Production Induced By Several Tens Of Mev Protons

We have developed a low threshold detector consisting of Bragg curve counter (BCC), two silicon surface barrier detectors (SSDs) and BGO scintillator to obtain experimental double-differential cross section (DDX) data for low energy proton production. Since the BCC offers advantage of self particle identification capability and a few pm-thick entrance window, protons produced by nuclear reactions down to 1 MeV have been identified. The capability of the detector is demonstrated in measurements using 70-MeV protons. Measured spectra are compared with calculation results of intra-nuclear cascade (INC) plus evaporation models and nuclear data library.