Photodisintegration ofLi7with progeny nuclei in excited states

Abstract

We study the reaction channels $^{7}\text{Li}+\ensuremath{\gamma}\ensuremath{\rightarrow}n+^{6}\text{Li}(2.19), ^{7}\text{Li}+\ensuremath{\gamma}\ensuremath{\rightarrow}n+^{6}\text{Li}(3.56)$, and $^{7}\text{Li}+\ensuremath{\gamma}\ensuremath{\rightarrow}d+^{5}\text{He}(1.27)\ensuremath{\rightarrow}n+d+^{4}\text{He}$ by detecting neutrons produced by photodisintegration events. We find absolute cross sections and angular dependence for $^{7}\text{Li}+\ensuremath{\gamma}\ensuremath{\rightarrow}n+^{6}\text{Li}(2.19)$ at photon energies 13 and 15 MeV and for $^{7}\text{Li}+\ensuremath{\gamma}\ensuremath{\rightarrow}n+^{6}\text{Li}(3.56)$ 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 $^{7}\text{Li}+\ensuremath{\gamma}\ensuremath{\rightarrow}d+^{5}\text{He}(1.27)\ensuremath{\rightarrow}n+d+^{4}\text{He}$ we obtain an upper bound on its cross section at photon energies 12, 13, and 15 MeV.