新型高光输出快响应的LaCl_3:Ce晶体时间响应性能测量

Measure the Time Characteristic of New High Lightout and Fast Decay LaCl_3:Ce Scintillator

LaCl3:Ce晶体是新型高发光产额、快衰减的无机晶体。利用皮秒级激光器和纳秒脉冲源对国产该类晶体的时间响应性能进行测量;同时推算并使用了用脉冲法获得晶体发光衰减常数的简单估算公式。实验结果表明:LaCl3:Ce晶体对皮秒脉冲器的时间响应衰减时间常数为25 ns,与文献符合较好;对纳秒脉冲源的时间响应衰减时间常数为69.13 ns。衰减时间的差异考虑为发光机制的不同与环境散射的影响。

LaCl3 ：Ce scintillator is developed newly that have the properties of high light yield and fast scintillation decay curves. The time response parameters of homemade LaCl3 ：Ce are measured with the picoseconds pulse laser and the nanosecond pulse γsource. At the same time, we have calculated and used the formula of pulse method gain to the decay time co natant of crystal shining. The results show： The decay time constant of LaCl3 ：Ce is 25 ns with the picoseconds pulse laser, same to the results of references. That is 69.13 ns with the nanosecond pulse γsource. The difference between the two data is considered as scintillation mechanism and entironment scattering.