RELAXATION PROCESS OF CHARGE-TRANSFER IN C-60

When an electron is transferred to C-60, the electron-lattice interact ion results in a distortion of the bond structure and a polaronlike st ate is formed. By solving the dynamical equations of molecules in a C- 60 cage, the time-dependent changes of the bond lengths are obtained. We find that the relaxation time to form a polaron is about 0.3 ps, an d is consistent with the experimental results. The implication of this ultrafast evolution, with comparison to the soliton-antisoliton mecha nism, is discussed.