Fabrication and scintillation properties of a flexible optical-guiding crystal scintillator

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<jats:title>Abstract</jats:title> <jats:p>Scintillation properties of a flexible optical-guiding crystal scintillator with a thallium-doped CsI (Tl:CsI) crystal and borosilicate glass as the core and cladding, respectively, are reported. The as-fabricated optical-guiding crystal scintillator exhibits a light yield of 31,000 photons MeV<jats:sup>−1</jats:sup> under 662 keV <jats:italic>γ</jats:italic>-ray irradiation. The recrystallized sample is transparent and provides a higher light yield of 54,000 photons MeV<jats:sup>–1</jats:sup>, which is comparable to that of single-crystal Tl:CsI. The decay times are 400 ns (28%) and 1,350 ns (72%). This material can serve as a scintillator fiber with high sensitivity to <jats:italic>γ</jats:italic>- and X-rays, high light yield, and energy discrimination.</jats:p>

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