B11 (α, Li7) Be8 Reaction at 28.4 and 29.0 MeV

Li 7 ions from the B 11 (α, Li 7 )Be 8 reaction were detected with a 50µ thick SSD covered with aluminum absorbers. The analyses suggest that the compound nucleus process is not favorable to the B 11 (α, Li 7 )Be 8 (g.s.) reaction. The angular distributions of Li 7 (0.478 MeV state) can be reproduced by the calculation based on the triton pickup process. The feature of the angular distributions of Li 7 (g.s.) is quite different from that of Li 7 (0.478 MeV state) and is qualitatively explained by the triton pickup process and the Li 7 knockout process interfering with each other.