为提高闪烁光纤辐射探测性能,采用改进的插棒法制备了基于高性能闪烁晶体材料LYSO∶Ce的石英包层晶体闪烁光纤。利用电子加速器进行电子辐照对比实验,研究了石英包层LYSO∶Ce闪烁光纤(SLCF)与现有的石英包层YAG∶Ce闪烁光纤(SYCF)的电子辐射响应,并进一步分析了光纤长度、光纤与辐射源距离对SLCF的辐射传感特性的影响。通过辐射实验验证了SLCF的辐射传感特性的可重复性。实验结果表明,SLCF具有优良的电子辐射响应和传感特性。

To improve the radiation detection performance of scintillating fiber, a silica cladding crystal scintillating fiber based on the high performance scintillation crystal LYSO∶Ce is prepared by a modified rod-in-tube method. First, the electron radiation comparison experiment is conducted by using an electron accelerator. The electron radiation responses of the silica cladding LYSO∶Ce scintillating fiber (SLCF) and existing silica cladding YAG∶Ce scintillating fiber (SYCF) are studied. Then, the influences of the fiber length and the distance from the fiber to the radiation source on the radiation sensing characteristics of SLCF are further analyzed. Finally, through the radiation experiment, the repeatability of radiation sensing characteristics of SLCF is tested. Experimental results show that SLCF has excellent electronic radiation response and sensing characteristics.