Luminescence model with quantum impact parameter for low energy ions

We have modified an analytical model of induced light production by energetic ions interacting in scintillating materials. The original model is based on the distribution of energy deposited by secondary electrons produced along the ion's track. The range of scattered electrons, and thus the energy distribution, depends on a classical impact parameter between the electron and the ion's track. The only adjustable parameter of the model is the quenching density rho(q). The modification here presented, consists in proposing a quantum impact parameter that leads to a better fit of the model to the experimental data at low incident ion energies. The light output response of CsI(T1) detectors to low energy ions (<3 MeV/A) is fitted with the modified model and comparison is made to the original model. (C) 2002 Elsevier Science B.V. All rights reserved.