  The scattering lengths of eta-meson collisions with light nuclei d,t,3He, and
4He are calculated on the basis of few-body equations in coherent
approximation. It is found that the eta-nucleus scattering length depends
strongly on the number of nucleons and the potential-range parameter. By taking
into account the off-shell behavior of the eta-N amplitude, the eta-4He
scattering length increases considerably.
