(a) The electron and proton distribution function versus energy. The initial spectrum (blue) for the electron and proton are the same as they share the same temperature. Solid curves are the electron spectrum and dashed curves are the proton spectrum at t/τ_A = 9.5, 13.5, and 17. (b) The locations of electrons with energy exceeding 1.0 ﹩{m}_{i}{C}_{{\rm{A}}}^{2}﹩ and protons with energy exceeding 10.0 ﹩{m}_{i}{C}_{{\rm{A}}}^{2}﹩.