Abstract

Raman-scattering experiments under hydrostatic pressure have been performed to investigate the pressure dependence of photopolymerization reaction coefficients in ${\mathrm{C}}_{60}$ crystals. Reaction coefficients of photopolymerization have been obtained from the observed variation of Raman spectra with irradiation time and a rate equation analysis. The dependence on the intermolecular distance clearly shows an exponential-type behavior, which suggests a photoreaction process described by the potential-energy surface with multiple minima.

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