STP1117: Radiation Damage in Single Crystal CsI(Tl) and Polycrystal CsI

    Barnouin, O
    University of Illinois at Urbana-Champaign, Urbana, IL

    Procoli, A
    University of Illinois at Urbana-Champaign, Urbana, IL

    Chung, H
    University of Illinois at Urbana-Champaign, Urbana, IL

    Miley, GH
    University of Illinois at Urbana-Champaign, Urbana, IL

    Pages: 8    Published: Jan 1990


    Abstract

    Radiation damage in single crystal CsI(Tl) and polycrystal CsI was assessed by measuring the changes in radioluminescent intensity caused by successive neutron and gamma ray pulses from a TRIGA nuclear reactor. The radioluminescent intensity from the single crystal decreases within nine pulses by 30% in the near infrared range (0.7–4.5 μm) and by 25% in the visible range (0.2–1 μm) before staying constant. For the polycrystal CsI, the emission in the visible range decreases by 60% within 6 pulses and then remains constant, whereas no measurable emission is observed in the infrared. Finally, a heating and cooling cycle is shown to repair the damage for both crystals.

    Keywords:

    Radiation damage, infrared radioluminescence, visible radioluminescence, cesium iodide, reactor irradiation, gamma ray irradiation, infrared window material


    Paper ID: STP26522S

    Committee/Subcommittee: E13.15

    DOI: 10.1520/STP26522S


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