Performance evaluation of newly developed SrI2(Eu) scintillator

M. Takabe, A. Kishimoto, J. Kataoka, S. Sakuragi, Y. Yamasaki

    Research output: Contribution to journalArticle

    Abstract

    The development of europium-doped strontium iodide (SrI2(Eu)) has attracted considerable attention, because of its excellent material properties as regards gamma-ray scintillator applications. These include its excellent energy resolution, high light output (>80,000ph/MeV), and high effective atomic number (Z=49). Here we report on the performance of ϕ(symbol) 1in×1in SrI2(Eu) cylindrical crystals newly fabricated by Union Materials Inc. In this study, we measured the energy resolution and light output at 10 °C temperature intervals between -40 and 40°C, using an optically coupled 2-in photomultiplier tube (PMT) (Super Bialkali, Hamamatsu). The SrI2(Eu) light output increased by 0.12%/°C as the temperature decreased. At -40°C, we obtained the optimal energy resolution recording 2.91±0.02% full width at half maximum (FWHM) for 662keV gamma rays measured with 137Cs. For comparison, we also measured the same crystal using both a large-area (19×19mm2) avalanche photodiode detector (APD) and 8×8 multi-pixel photon counter (MPPC) arrays of 3×3mm2 pixels. The energy resolutions of 2.94±0.02%, 3.14±0.06% and 3.99±0.01% were obtained using PMT, APD, and MPPC, respectively, as measured at -20°C. We also measured the inherent background of SrI2(Eu) in a cave composed of Cu-Pb blocks with their thickness of 5-10cm confirming that SrI2(Eu) has an extremely low inherent background radiation. In this study, we have shown that SrI2(Eu) is a promising scintillator that can be utilized for radiation measurements incorporating low-energy X-rays to high-energy gamma rays, and can thus be applied in various medical, industrial, and environmental treatment fields in the near future.

    Fingerprint

    Gamma rays
    Phosphors
    scintillation counters
    Avalanche photodiodes
    Pixels
    Photomultipliers
    evaluation
    Photons
    Detectors
    Radiation
    Caves
    Crystals
    Europium
    pixels
    gamma rays
    photomultiplier tubes
    Strontium
    Full width at half maximum
    avalanches
    photodiodes

    Keywords

    • Energy resolution
    • Inherent background radiation
    • Light output
    • Radiation detector
    • SrI(Eu) scintillator
    • Temperature dependence

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Instrumentation

    Cite this

    @article{a049b4bee53f4f3b8d57479957b76939,
    title = "Performance evaluation of newly developed SrI2(Eu) scintillator",
    abstract = "The development of europium-doped strontium iodide (SrI2(Eu)) has attracted considerable attention, because of its excellent material properties as regards gamma-ray scintillator applications. These include its excellent energy resolution, high light output (>80,000ph/MeV), and high effective atomic number (Z=49). Here we report on the performance of ϕ(symbol) 1in×1in SrI2(Eu) cylindrical crystals newly fabricated by Union Materials Inc. In this study, we measured the energy resolution and light output at 10 °C temperature intervals between -40 and 40°C, using an optically coupled 2-in photomultiplier tube (PMT) (Super Bialkali, Hamamatsu). The SrI2(Eu) light output increased by 0.12{\%}/°C as the temperature decreased. At -40°C, we obtained the optimal energy resolution recording 2.91±0.02{\%} full width at half maximum (FWHM) for 662keV gamma rays measured with 137Cs. For comparison, we also measured the same crystal using both a large-area (19×19mm2) avalanche photodiode detector (APD) and 8×8 multi-pixel photon counter (MPPC) arrays of 3×3mm2 pixels. The energy resolutions of 2.94±0.02{\%}, 3.14±0.06{\%} and 3.99±0.01{\%} were obtained using PMT, APD, and MPPC, respectively, as measured at -20°C. We also measured the inherent background of SrI2(Eu) in a cave composed of Cu-Pb blocks with their thickness of 5-10cm confirming that SrI2(Eu) has an extremely low inherent background radiation. In this study, we have shown that SrI2(Eu) is a promising scintillator that can be utilized for radiation measurements incorporating low-energy X-rays to high-energy gamma rays, and can thus be applied in various medical, industrial, and environmental treatment fields in the near future.",
    keywords = "Energy resolution, Inherent background radiation, Light output, Radiation detector, SrI(Eu) scintillator, Temperature dependence",
    author = "M. Takabe and A. Kishimoto and J. Kataoka and S. Sakuragi and Y. Yamasaki",
    year = "2016",
    month = "1",
    day = "18",
    doi = "10.1016/j.nima.2016.04.043",
    language = "English",
    journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
    issn = "0168-9002",
    publisher = "Elsevier",

    }

    TY - JOUR

    T1 - Performance evaluation of newly developed SrI2(Eu) scintillator

    AU - Takabe, M.

    AU - Kishimoto, A.

    AU - Kataoka, J.

    AU - Sakuragi, S.

    AU - Yamasaki, Y.

    PY - 2016/1/18

    Y1 - 2016/1/18

    N2 - The development of europium-doped strontium iodide (SrI2(Eu)) has attracted considerable attention, because of its excellent material properties as regards gamma-ray scintillator applications. These include its excellent energy resolution, high light output (>80,000ph/MeV), and high effective atomic number (Z=49). Here we report on the performance of ϕ(symbol) 1in×1in SrI2(Eu) cylindrical crystals newly fabricated by Union Materials Inc. In this study, we measured the energy resolution and light output at 10 °C temperature intervals between -40 and 40°C, using an optically coupled 2-in photomultiplier tube (PMT) (Super Bialkali, Hamamatsu). The SrI2(Eu) light output increased by 0.12%/°C as the temperature decreased. At -40°C, we obtained the optimal energy resolution recording 2.91±0.02% full width at half maximum (FWHM) for 662keV gamma rays measured with 137Cs. For comparison, we also measured the same crystal using both a large-area (19×19mm2) avalanche photodiode detector (APD) and 8×8 multi-pixel photon counter (MPPC) arrays of 3×3mm2 pixels. The energy resolutions of 2.94±0.02%, 3.14±0.06% and 3.99±0.01% were obtained using PMT, APD, and MPPC, respectively, as measured at -20°C. We also measured the inherent background of SrI2(Eu) in a cave composed of Cu-Pb blocks with their thickness of 5-10cm confirming that SrI2(Eu) has an extremely low inherent background radiation. In this study, we have shown that SrI2(Eu) is a promising scintillator that can be utilized for radiation measurements incorporating low-energy X-rays to high-energy gamma rays, and can thus be applied in various medical, industrial, and environmental treatment fields in the near future.

    AB - The development of europium-doped strontium iodide (SrI2(Eu)) has attracted considerable attention, because of its excellent material properties as regards gamma-ray scintillator applications. These include its excellent energy resolution, high light output (>80,000ph/MeV), and high effective atomic number (Z=49). Here we report on the performance of ϕ(symbol) 1in×1in SrI2(Eu) cylindrical crystals newly fabricated by Union Materials Inc. In this study, we measured the energy resolution and light output at 10 °C temperature intervals between -40 and 40°C, using an optically coupled 2-in photomultiplier tube (PMT) (Super Bialkali, Hamamatsu). The SrI2(Eu) light output increased by 0.12%/°C as the temperature decreased. At -40°C, we obtained the optimal energy resolution recording 2.91±0.02% full width at half maximum (FWHM) for 662keV gamma rays measured with 137Cs. For comparison, we also measured the same crystal using both a large-area (19×19mm2) avalanche photodiode detector (APD) and 8×8 multi-pixel photon counter (MPPC) arrays of 3×3mm2 pixels. The energy resolutions of 2.94±0.02%, 3.14±0.06% and 3.99±0.01% were obtained using PMT, APD, and MPPC, respectively, as measured at -20°C. We also measured the inherent background of SrI2(Eu) in a cave composed of Cu-Pb blocks with their thickness of 5-10cm confirming that SrI2(Eu) has an extremely low inherent background radiation. In this study, we have shown that SrI2(Eu) is a promising scintillator that can be utilized for radiation measurements incorporating low-energy X-rays to high-energy gamma rays, and can thus be applied in various medical, industrial, and environmental treatment fields in the near future.

    KW - Energy resolution

    KW - Inherent background radiation

    KW - Light output

    KW - Radiation detector

    KW - SrI(Eu) scintillator

    KW - Temperature dependence

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    U2 - 10.1016/j.nima.2016.04.043

    DO - 10.1016/j.nima.2016.04.043

    M3 - Article

    JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

    JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

    SN - 0168-9002

    ER -