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The p + 6Li --> eta + 7Be reaction has been investigated with an emphasis onthe eta meson and 7Be interaction in the final state. Considering the 6Li and7Be nuclei to be alpha-d and alpha-3He clusters respectively, the reaction ismodelled to proceed via the p + d [alpha] --> 3He [\alpha] + eta reaction withthe alpha remaining a spectator. The eta meson interacts with 7Be via multiplescatterings on the 3He and alpha clusters inside 7Be. The individual eta-3Heand eta-alpha scatterings are evaluated using few body equations for the eta-3Nand eta-4N systems with a coupled channel eta-N interaction as an input.Calculations including four low-lying states of 7Be lead to a double humpstructure in the total cross section corresponding to the $L = 1 (J = (1/2)^-,(3/2)^-)$ and $L = 3 (J = (5/2)^-, (7/2)^-)$ angular momentum states. The humpsarise due to the off-shell rescattering of the eta meson on the 7Be nucleus inthe final state.

Eta meson rescattering effects in the p + 6Li --> eta + 7Be reaction near threshold