SPIN-LATTICE RELAXATION STUDY OF THE PHOTOEXCITED TRIPLET-STATES IN SOLID C-60

The spin-lattice relaxation (SLR) of the photoexcited tripler states i n fullerene C-60 crystal is investigated at low temperatures and high magnetic fields. The mixing of the translational and rotational motion s of the molecules (TRM relaxation mechanism) is chosen as the major p henomenon, leading to the coupling of the spin system with acoustic vi brations, The general expressions of the SLR rates for the direct one- phonon processes are obtained, The results of calculation are in accor dance with available experimental data. (C) 1997 American Institute of Physics.