Light charged particle production in neutron-induced reactions on aluminum atEn=62.7MeV

Abstract

Double-differential cross sections for $62.7\ifmmode\pm\else\textpm\fi{}1.0$ MeV neutron-induced light charged particle $(p$, $d$, $t$, and $\ensuremath{\alpha})$ production on aluminum are reported. Angular distributions were measured at laboratory angles between $20\ifmmode^\circ\else\textdegree\fi{}$ and $160\ifmmode^\circ\else\textdegree\fi{}$ in steps of $10\ifmmode^\circ\else\textdegree\fi{}$. Procedures for data taking and data reduction are described. Results for double-differential, energy-differential, and total production cross sections are presented. The measurements are compared to existing proton-induced data and to nuclear model calculations which include preequilibrium and equilibrium decay mechanisms. Agreement with the model calculations is good for all ejectile types except for deuterons, where pickup processes are overestimated. The neutron-induced data presented are shown to be in good agreement with experimental proton-induced data for charge-symmetric reaction channels. For the proton emission channel the approximate factor of two between the two emission spectrum measurements is explained.