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    高師機構典藏 NKNUIR > 理學院 > 物理學系 > 期刊論文 >  Item 987654321/10753
    Please use this identifier to cite or link to this item: http://ir.nknu.edu.tw/ir/handle/987654321/10753

    題名: Survey Of The Properties Of BGO Crystals For The Extreme Forward Calorimeter At BELLE
    Authors: 郭榮升
    R. Akhmetshin;M. Z. Wang(NTU);Rurng-Sheng Kuo(NKNU);H. C. Huang;R. S. Lu;K.L. Tsai;K. Ueno(NTU)
    貢獻者: 物理系
    Keywords: BGO;Dose;Recovery
    Date: 2000-12-01
    Issue Date: 2010-11-11 09:07:08 (UTC+8)
    Abstract: We check the scintillation light yield of all BGO crystals used for the Extreme Forward Calorimeter (EFC) at BELLE. The percentage spread of the distribution is only 6%. The nonuniformity of the light yields measured lengthwise for the forward EFC is close to 13% and is ∼0% for the backward EFC. The test crystals, two per ingot, from mass-production are subjected to the radiation hardness test. The results obtained at BINP and NTU are in good agreement. Some EFC crystals, selected randomly, show the light yields drop about 25–50% after receiving 1 krad dose and remain stable afterwards. There is little sensitivity to the rate that the 1 krad dose is received, since the recovery process is very slow, in the order of days to weeks.
    關聯: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment / Volume 455, Issue 2, P.324–328
    Appears in Collections:[物理學系] 期刊論文
    [物理系] 郭榮升

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