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Description:
We have studied the reaction p + Al-27 -> He-3 + p + pi(-) + X at recoil-free kinematics. An eta meson possibly produced in this reaction would be thus almost at rest in the laboratory system and could therefore be bound with high probability, if nuclear eta states exist. The decay of such a state through the N*(1535) resonance would lead to a proton-pi(-) pair emitted in opposite directions. For these conditions we find some indication of such a bound state. An upper limit of approximate to 0.5 nb is found.