Applications of amorphous track structure models for correction of ionization quenching in organic scintillators exposed to ion beams

Jeppe Brage Christensen*, Claus E. Andersen

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The scintillation response of organic plastic scintillators irradiated with heavy ions is investigated with the open-source code ExcitonQuenching. The software relies on amorphous track structure theory to account for the radial energy deposition by secondary electrons (EDSE) in ion tracks. The kinematic Blanc model is applied to evaluate the ionization quenching for a given ion by taking the decay time, light yield, and density of the scintillator into account. ExcitonQuenching predicts the scintillation response without a priori knowledge of any measured response curves in contrast to other EDSE models, such as the correction method due to Birks, which rely on free fitting parameters for each ion. ExcitonQuenching is validated against published measurements of the Pilot-U scintillator exposed to several ions. The agreement with experimental data is between 5% and 9% for ions with atomic number but deviates significantly for heavier ions.
    Original languageEnglish
    JournalRadiation Measurements
    Volume124
    Pages (from-to)158-162
    ISSN1350-4487
    DOIs
    Publication statusPublished - 2019

    Keywords

    • Ionizing quenching
    • Organic plastic scintillators
    • Ion beam dosimetry
    • Amorphous track structure theory
    • Particle therapy

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