STUDY ON RADIATION DAMAGE OF CHINESE-MADE HIGH-Z SCINTILLATION CRYSTALS

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ZHU Guo-Yi, HE Jing-Tang, GU Yi-Fan, QIAN Zhong-Min and CHU Guo-Zhu. STUDY ON RADIATION DAMAGE OF CHINESE-MADE HIGH-Z SCINTILLATION CRYSTALS[J]. Chinese Physics C, 1990, 14(1): 8-15.
ZHU Guo-Yi, HE Jing-Tang, GU Yi-Fan, QIAN Zhong-Min and CHU Guo-Zhu. STUDY ON RADIATION DAMAGE OF CHINESE-MADE HIGH-Z SCINTILLATION CRYSTALS[J]. Chinese Physics C, 1990, 14(1): 8-15. shu
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Received: 1900-01-01
Revised: 1900-01-01
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STUDY ON RADIATION DAMAGE OF CHINESE-MADE HIGH-Z SCINTILLATION CRYSTALS

    Corresponding author: ZHU Guo-Yi,
  • Institute of High Energy Physics,Academia Sinica,Beijing

Abstract: Radiation damage effects of several Chinese-made high-Z scintillation crystals have been studied on a 60Co irradiation unit of 100KCi Results on small size BGO crystals irradiated by 60Co γ rays with various doses from 5×103 to 7.5×105rad are presented.The decrease in scintillation light output depends non-linearly on the dose applied and saturation effects above 5×104rad have been observed.The spontaneous recovery of the light output can be described by the sum of at least three exponential functions.The radiation damage effects of small size BaF2,CsI(Tl) and ZnWO4 crystals at 5×105rad were also investigated.Serious damage to BaF2 has been found.Preliminary analyses indicate that this may be attributed to the inclusion of certain critical elements in the crystal.CsI(T1) after irradiation does not exhibit strong afterglow of noticeable coloration as were reported in the literature.

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