Study on Radiation Damage of Chinese-made High-<span style="text-decoration: underline">Z</span> Scintillation Crystals

Zhu Guoyi; He Jingtang; Gu Yifan; Qian Zhongmin; Chu Guozhu

Chinese Physics C> 1990, Vol. 14> Issue(S2) : 115-124

Study on Radiation Damage of Chinese-made High-Z Scintillation Crystals

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing

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Radiation damage effects of several Chinese-made high-Z scintillation crystals have been studied on a ⁶⁰Co irradiation unit of 100 kCi. Results on small size BGO crystals irradiated by ⁶⁰Co γ-rays with various doses from 5×10³ to 7.5×10⁵ rad are presented. The non-linear decrease of the scintillation light output with the increase of the dose applied and saturation effects 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 5×10⁵ rad 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(Tl) after irradiation does not exhibit strong afterglow or noticeable coloration as were reported in the literature.

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Zhu Guoyi, He Jingtang, Gu Yifan, Qian Zhongmin and Chu Guozhu. Study on Radiation Damage of Chinese-made High-Z Scintillation Crystals[J]. Chinese Physics C, 1990, 14(S2): 115-124.

Zhu Guoyi, He Jingtang, Gu Yifan, Qian Zhongmin and Chu Guozhu. Study on Radiation Damage of Chinese-made High-Z Scintillation Crystals[J]. Chinese Physics C, 1990, 14(S2): 115-124. shu

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Received: 1989-04-27

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沈阳化工大学材料科学与工程学院沈阳 110142

Study on Radiation Damage of Chinese-made High-Z Scintillation Crystals

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing

Received Date: 1989-04-27

Abstract: Radiation damage effects of several Chinese-made high-Z scintillation crystals have been studied on a ⁶⁰Co irradiation unit of 100 kCi. Results on small size BGO crystals irradiated by ⁶⁰Co γ-rays with various doses from 5×10³ to 7.5×10⁵ rad are presented. The non-linear decrease of the scintillation light output with the increase of the dose applied and saturation effects 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 5×10⁵ rad 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(Tl) after irradiation does not exhibit strong afterglow or noticeable coloration as were reported in the literature.

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