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A continuum theory of scintillation in inorganic scintillating crystals

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  • Fabrizio Daví

    (DICEA, Universitá Politecnica delle Marche)

Abstract

We obtain, by starting from the balance laws of a continuum endowed with a vectorial microstructure and with a suitable thermodynamics, the evolution equation for the excitation carriers in scintillating crystals. These equations, coupled with the heat and electrostatic equations, describe the non-proportional response of a scintillator to incoming ionizing radiations in terms of a reaction and diffusion-drift system. The system of partial differential equations we arrive at allows for an explicit estimate of the decay time, a result which is obtained here for the first time for scintillators. Moreover, we show how the two most popular phenomenological models in use, namely the kinetic and diffusive models, can be recovered, among many others, as a special case of our model. An example with the available data for NaI:Tl is finally given and discussed, showing how these models depend on the energy of ionizing radiations. Graphical abstract

Suggested Citation

  • Fabrizio Daví, 2019. "A continuum theory of scintillation in inorganic scintillating crystals," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 92(1), pages 1-12, January.
    • Handle: RePEc:spr:eurphb:v:92:y:2019:i:1:d:10.1140_epjb_e2018-80590-2
    DOI: 10.1140/epjb/e2018-80590-2
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    Mesoscopic and Nanoscale Systems;

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