Doubly Coherent Production Of Pi- By He-3 Ions Of 910-mev

The inclusive pion spectrum from the reaction 3He+6Li-->π-+X at 910 MeV was measured at 0° with moderate resolution up to the kinematic limit of the two-body final-state reaction. A first analysis shows that the production of high-energy pions cannot be explained by the NN-->NNπ process using conventional nucleon momentum distributions. At the end of the spectrum a clear deviation from the general falloff slope is observed and attributed to the doubly coherent reaction 3He+6Li-->9C+π-.