Differential cross sections of the reaction 4He(t,n)6Li between 8.5 and 16.5 MeV and the n-6Li cross-section standard

Differential cross sections of the reaction 4He(t,n)6Li, including some data of the first and second excited states of 6Li, were measured and compared with an R-matrix analysis of previous data in the 7Li system. Excellent agreement is observed for the angular distribution at the 0.24-MeV resonance of n-6Li, and the shape of the angular distribution for 4He(t,n1)6Li at 12.9 MeV is predicted qualitatively by the R-matrix analysis. However, for neutron energies greater than 0.5 MeV for 6Li(n,t)4He the zero-degree excitation function is consistently lower (about 30%) in the R-matrix analysis