The next heavier standard neutron cross sections are 10B(n, a)7Li and 10B(n, a, y)7Li from thermal energies to 250 keV. As can be seen from the energies of light nuclei [51] there are many resonances in the compound system 11B close to the 10B-n threshold. There are already many channels open, like 10Be-p, 8Be — 3H, and 7Li -4He together with the first excited state, and furthermore the 11B nucleus has many particle stable states below the

lowest break-up threshold. Therefore describing the reactions 10B (n, а0;1) microscopically poses a major problem. For the potential described in the previous section this task seems to be feasible, but the outcome is unknown.