Quantum lattice fluctuations and luminescence inC60

We consider luminescence in photoexcited neutral ${\mathrm{C}}_{60}$ using the Su-Schrieffer-Heeger model applied to a single ${\mathrm{C}}_{60}$ molecule. To calculate the luminescence we use a collective-coordinate method where our collective coordinate resembles the displacement of the carbon atoms of the Hg(8) phonon mode and extrapolates between the ground-state ‘‘dimerization’’ and the exciton polaron. There is good agreement for the existing luminescence peak spacing and fair agreement for the relative intensity. We predict the existence of further peaks not yet resolved in experiment.