The angular distributions of charged particles from the ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$($n$,$t$)${}_{}{}^4{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$($n$,$\alpha$)${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ were measured with monoenergetic neutron beams from a reactor. Silicon surface barrier detectors were used. The ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$($n$,$t$)${}_{}{}^4{}_{}{}^{}\mathrm{He}$ data were compared with previous results having poorer angular resolution and with an $R$-matrix calculation. The ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$($n$,$\alpha$) ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ data show a marked anisotropy at 2 and 24 keV for the ground state group and a lesser anisotropy for $\alpha$'s leading to the first excited state of ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$. Branching ratios are measured at thermal, 2- and 24-keV neutron energies. The results are compared with the $R$-matrix calculation.

NUCLEAR REACTIONS Neutron capture, ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$; measured($n$,$\alpha$)$\sigma \left(\theta \right)$, ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$ branching ratio, $E_n=th, 2,24$ keV. Comparison with $R$-matrix calculation.

• Received 1 November 1978

DOI:https://doi.org/10.1103/PhysRevC.19.1159