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

ZHU Guo-Yi; HE Jing-Tang; GU Yi-Fan; QIAN Zhong-Min; CHU Guo-Zhu

Chinese Physics C> 1990, Vol. 14> Issue(1) : 8-15

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

Institute of High Energy Physics,Academia Sinica,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 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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R. Takagi et al., J. Crylsal Growsh, 52(1981), 584; M. Cavalli-Sforza, Procccdings Intcrnational Workshop on Bismuth Germanate,Princeton University(1982), 79; M. Kobayashi et al., Nucl. Inrsr, and Meth.,206(1983), 107[2] 朱国义、毛裕芳、顾以藩，原子能科学技术，22(1988),494.[3] G. J. Bobbink et al., Nucl. Inrtr. and Meth., 227(1984), 470[4] 李士骏等，电离辐射剂量学(原子能出版社1985).[5] 楚国柱，中国科学院高能物理研究所硕士论文(1987),[6] F. James and M. Roos, Comp. Phyr. Comm., 10(1975), 343.[7] C. Laviron and P. Lecoq, Nucl. Instr. and Mcth., 227(1984), 45[8] Ch. Bieler et al., Nucl. Instr, and Meth., A234(1985), 435.[9] E. Lorenz, MPI-PAE/Exp. E1-129(1984).[10] F. Porter et al.. UPSTAT: A proposal for a High-Precision North Area Detector (1983).[11] G. I. Kirkbride，私人通信(1988).[12] S. Majewski and M. K. Bentley, Nucl. Instr. and Mcth., A260(1987), 373.[13] M. Murashita et al., Nucl. Instr, and Meth., A243(1986), 67[14] 宫竹芳等，中国科技大学内部报告(1986),[15] S. Schlogl et al., Nucl. Instr, and Matlz., A242(1985), 89.[16] OLEO Collaboration: "CLEO-Updated Proposal" CLNS 85/634(1985).[17] M. Kobayashi et al., KEK. Reprint 86-11(May 1986).[18] Y. C, Zhu et al., Nucl. Instr. and Meth., A244(1986),579

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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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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

Corresponding author: ZHU Guo-Yi,

Institute of High Energy Physics,Academia Sinica,Beijing

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1990-01-05

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

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