Photodisintegration of Li7 with progeny nuclei in excited states

We study the reaction channels Li-7 + gamma Li-6(2.19), Li-7 + gamma -> Li-6(3.56), and Li-7 + gamma -> d + He-5(1.27) -> n + d He-4 by detecting neutrons produced by photodisintegration events. We find absolute cross sections and angular dependence for Li-7 + gamma -> n + Li-6(2.19) at photon energies 13 and 15 MeV and for Li-7 + gamma n + Li-6(3.56) at the photon energy 15 MeV. The incident photons are linearly polarized and we report dependence of the cross sections on polarization. For the reaction channel Li-7 +gamma + He-5(1.27) -> n + d He-4 we obtain an upper bound on its cross section at photon energies 12, 13, and 15 MeV.