Validation of Neutron-Induced Reactions on Natural Carbon Using an Active Target at Neutron Energies Up to 22 MeV at LANSCE

A single crystal chemical vapor deposited (sCVD) diamond detector is used as an active target to measure neutron-induced reactions on natural carbon using the neutrons produced by spallation, with a broad energy spectrum at LANSCE. The neutron-induced reactions are detected in the diamond as low as E-n = 400 keV and up to approximately 100 MeV. Relative cross sections for C-12(n, alpha(0)), C-12(n, p(0)), C-12(n, d(0) + p(1)), and C-13(n, alpha(0)) are reported up to E-n = 22 MeV and comparisons on detected pulse-height spectra and detector response of scattering reactions aremade with GEANT4 simulations using the ENDF/B-VIII.0 evaluated nuclear data library up to 20 MeV. The results are compared with past experimental data, including other works that incorporate diamond detectors as an active carbon target. In addition, R-matrix calculations for the C-13 + n system are presented.