参考法扣除溴化镧探测器固有本底谱

为减少溴化镧La Br3(Ce)]探测器固有放射性对低计数水平下测量的影响,探讨了一种参考法扣除La Br3(Ce)探测器固有本底谱。通过引入一个碘化钠Na I(Tl)]探测器作为参考,并利用MC模拟得到两探测器的探测效率比,将屏蔽条件下La Br3(Ce)探测器能谱中的环境本底谱扣除,得到更准确的La Br3(Ce)探测器固有本底谱。实测能谱在扣除固有本底谱后,原本被固有本底谱影响的峰得到了恢复,有助于后续能谱分析中的定性和定量分析。

Reference Method for Removing Intrinsic Background Spectrum of LaBr3(Ce) Detector

In order to reduce the influence of the intrinsic radioactivity of LaBr3(Ce) detector on the measurement at low counting levels, a reference method for removing the intrinsic background spectrum of LaBr3(Ce) detector was discussed.By introducing a NaI(Tl) detector as a reference and using the Monte Carlo method to simulate the detection efficiency ratio of the two detectors, the environmental background spectrum of the LaBr3(Ce) detector was subtracted to obtain a more accurate intrinsic background spectrum.After the intrinsic background spectrum was removed, the peaks originally affected by it was restored, which is helpful for the qualitative and quantitative analysis in the subsequent spectrum analysis.