The temperature dependence of BGO coupled with photomultiplier tube R5610A-01 was studied in the range of -30{deg}C~30{deg}C. The temperature coefficient of the BGO and R5610A in whole was tested to be -1.82%. And the temperature coefficient of the gain of the R5610A is -0.44% which was tested in the same situation using a blue LED. Thus the temperature coefficient of BGOs light yield can be evaluated as -1.38%.
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