Inelastic reaction of 14 MeV neutrons from 7Li

Results of measurements are reported for the double-differential cross section $\left\langle {d^{2}\sigma \mathord{\left/ {\vphantom {\sigma {\mbox{d}E_{\mbox{n}} \mbox{d}\Omega_{\mbox{n}} }}} \right. \kern-\nulldelimiterspace} {\mbox{d}E_{\mbox{n}} \mbox{d}\Omega_{\mbox{n}} }} \right\rangle_{0^{\circ}<\theta <7.4^{\circ}} $ for the inelastic scattering and reaction of 14-MeV neutrons with $^{\mathrm{7}}$Li. In the experiment, the bright neutron source ($L=$ 10$^{\mathrm{24\thinspace }}$s$^{\mathrm{-1}})$ created by the OMEGA pulsed Laser System\footnote{ T. R. Boehly \textit{et al}., Opt. Commun. \textbf{133}, 495 (1997).}, in inertially confined DT thermonuclear fusion reactions was used to irradiate an isotropically separated $^{\mathrm{7}}$Li target. Absolute yields and energy spectra of scattered neutrons and reactions were detected with a sensitive high-dynamic-range neutron time-of-flight spectrometer. In a forward-angle geometry $\left( {\theta =0^{\circ}\;\mbox{to}\;7.4^{\circ}} \right),$ the differential neutron cross section, measured for the neutron energy range 0.5 MeV $\le $ E$_{\mathrm{n}}\le $ 6 MeV, shows significant deviations from evaluated data in the nuclear database. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.