DOES THE GROUND-STATE RESONANCE OF LI-1O OVERLAP NEUTRON THRESHOLD

Recent measurements suggest that the ground state of Li-10 is a resona nce which may well be wide enough to overlap the (n + Li-9) threshold. In this context we recall some of the curious properties of resonance s located near threshold and entered from a non-decay channel, includi ng their asymmetry and the fact that the peak observed in the cross se ction occurs at neither the R-matrix nor the S-matrix energy, but rath er between the two. Because of these and other complications, it does not seem likely that either the l-value of the resonance or the energy of the corresponding state can accurately be determined from the shap e of the resonance peak alone.