| Popis: |
Results are reported on experimental measurements of total cross sections for ($^{6,7}\mathrm{Li}, \mathrm{xn}$), ($^{6,7}\mathrm{Li}, f$), ($^{7}\mathrm{Li}, \ensuremath{\alpha}\mathrm{xn}$), ($^{7}\mathrm{Li}, \mathrm{txn}$), and ($^{7}\mathrm{Li}, \ensuremath{\alpha}p$) reactions on a $^{209}\mathrm{Bi}$ target at bombarding energies in the range 25-34 MeV. At $^{7}\mathrm{Li}$ bombarding energies of 32 and 30 MeV, the cross sections for transfer reactions are 57 and 70%, respectively, of the total measured cross section. At energies below the Coulomb barrier, the cross section for transfer reactions becomes considerably larger than those for compound nucleus reactions.NUCLEAR REACTIONS $^{209}\mathrm{Bi}(^{6,7}\mathrm{Li}, xn)$, ($^{6,7}\mathrm{Li}, f$), ($^{7}\mathrm{Li}, \ensuremath{\alpha}\mathrm{xn}$), ($^{7}\mathrm{Li}, \mathrm{txn}$), ($^{7}\mathrm{Li}, \ensuremath{\alpha}p$), $E=25\ensuremath{-}34$ MeV; measured $\ensuremath{\sigma}(E)$. |
