6He+6Hemolecular resonances as highly excited states of12Be

Molecular resonances recently observed in the ${}^{12}{\overrightarrow{\mathrm{Be}}}^6\mathrm{He}{+}^6\mathrm{He}$ breakup-reaction experiment are studied by the microscopic coupled-channels (CC) calculation of the ${}^6\mathrm{He}{+}^6\mathrm{He}$ scattering, in which excitations of the soft-dipole and quadrupole modes of the colliding ${}^6\mathrm{He}$ nuclei are taken into account in the Goldhaber-Teller model. The CC calculation predicts several molecular-rotational bands in the energy range of the observed resonances and the energies and spins of the calculated resonances agree well with the experimental data.