A NEW PHASE IN PHOTOPOLYMERIZED C-60

The process of phototransformation was analyzed by Raman spectroscopy. Characteristic features in the spectra were found to depend on the tr ansformation temperature. A comparison with ab initio calculations by Porezag et al. was performed, from which the material irradiated at el evated temperatures was assigned to a C-60 dimer. The material is stab le against further phototransformation at room temperature. The room t emperature irradiated material matches best with triangular models ind icating a zig zag structure, which is in good agreement with recent AF M measurements.