The total elastic cross section, ${}_{}{}^6{}_{}{}^{}\mathrm{Li}(n, \alpha ){}_{}{}^3{}_{}{}^{}\mathrm{H}$ cross section, differential cross section, and polarization are calculated for the $n$-${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ system in the energy range 0-5 MeV by using general $R$-matrix theory and taking into account various coupled channels in addition to the direct channels. The results are compared with the experimental results and earlier calculations. Our calculations are helpful in estimating the contribution of dominant coupled channels to the cross sections in 0-5 MeV energy range.

NUCLEAR REACTIONS $R$-matrix theory, $n$-${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ system, cross sections, polarization.

• Received 17 September 1976

DOI:https://doi.org/10.1103/PhysRevC.15.1244