Angular distributions for alpha particles from ${\mathrm{Li}}^6({\mathrm{Li}}^6,\alpha ){\mathrm{Be}}^8$ have been obtained from five distinct alpha-particle peaks. However, only one peak, that corresponding to the 2.90-MeV state of ${\mathrm{Be}}^8$, has been positively identified. An analysis of the ${\mathrm{Li}}^6$+${\mathrm{Li}}^6$ gamma-ray spectrum with 100 times more counts than previous data indicate that no gamma ray from ${\mathrm{Be}}^8$ exists with an intensity greater than 2×${10}^{-5\mathrm{}}$% that of the 6.90-MeV peak from ${\mathrm{C}}^{11}$ and ${\mathrm{B}}^{11}$. This indicates an $\alpha +d$ configuration for ${\mathrm{Li}}^6$. The experiment has been performed with a Van de Graaff accelerator.

DOI:https://doi.org/10.1103/PhysRev.133.B920