Abstract
Time-dependent Hartree-Fock calculations have been performed for fusion reactions of 4He + 4He → 8Be∗, followed by 4He + 8Be∗. Depending on the orientation of the initial state, a linear chain vibrational state or a triangular vibration is found in 12C, with transitions between these states observed. The vibrations of the linear chain state and the triangular state occur at '9 and 4 MeV respectively