Degradation of the scintillation yield of anthracene under high-fluence carbon ion beams

We have measured the deterioration of the scintillation yield of anthracene samples under carbon beams at nine different energies between 25 and 100MeV. The real-time measurement of the scintillation yield has been performed by means of an optical fibre connected to a compact photon counting head. Results are interpreted by the Birks model from which we deduce the fluence needed to reduce the scintillation yield by a factor of two and also an estimation of the damage cross-sections of scintillation centres.