Low Dose Rate Radiation Behaviors of Y3+ Doping PbWO4 Crystals

Abstract

Abstract: Although trivalent ions (such as La³⁺, Lu³⁺ and Y³⁺) doping can significantly improve the radiation hardness of lead tungstate crystals, some Y³⁺
doping PWO crystals show exceptional behaviors under low dose rate radiation, namely, the light yield increases even exposed to UV irradiation. In addition the radiation
hardness is sensitive to annealing temperature. In this study some Y³⁺ doping crystal samples that have the phenomenon mentioned above were chosen and
the relationship between transmission and light yield of the samples investigated. The experimental results show that the increase of light output not only exists in
the topside of the crystals, but also in the seed side, and is accompanied with optical transmission change from 380nm to 500nm simultaneously. The as grown and annealing
induced 430nm color centers are unstable and can be “bleached” by low dose rate irradiation. The results of series annealing experiments of the sample segments can
interpret the phenomenon that radiation hardness is sensitive to annealing temperature.

Key words: lead tungstate, doping, radiation hardness

CLC Number:

ZHANG Xin,LIAO Jing-Ying,YUAN Hui,SHEN Bing-Fu,SHAO Pei-Fa,LI Chang-Quan,YIN Zhi-Wen. Low Dose Rate Radiation Behaviors of Y³⁺ Doping PbWO₄ Crystals[J]. Journal of Inorganic Materials.

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Low Dose Rate Radiation Behaviors of Y³⁺ Doping PbWO₄ Crystals

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