3-BODY RESONANCES IN HE-6, LI-6, AND BE-6, AND THE SOFT DIPOLE MODE PROBLEM OF NEUTRON HALO NUCLEI - COMMENT

In a recent publication Csoto suggests that the sequential decay of Li -11 through resonances in Li-10 could explain the peak seen at 1.2 MeV of excitation in the B-11(pi(-), pi(+)) reaction. We point out that t his is in conflict with widely accepted notions of probe and target in teractions in the measurement of inclusive excitation functions via nu clear reactions ranging from inelastic scattering and heavy-ion transf er reactions to pion double-charge exchange. We also show that the sug gested mechanism leads to incorrect predictions in other nuclei, and s o we conclude that the apparent success of the mechanism in explaining the observed energy of excited states in the Li-11 and He-6 systems i s accidental.