基于数字脉冲成形技术的HPGeγ谱仪系统研究

Study on HPGe γ Spectrometry Based on Digital Pulse Shaping Technology

  • 摘要: 为满足高能量分辨率γ能谱测量要求,设计了基于数字脉冲成形技术的HPGe γ谱仪系统。该系统由前端电路、数字信号处理模块和上位机软件3部分组成,实现了8192道能谱测量。本文对前端电路的设计及数字脉冲成形参数的选择进行了介绍,并用60Co、134Cs、137Cs和152Eu源对该系统进行了初步测试。测试结果表明,基于数字脉冲成形技术的HPGe γ谱仪系统对1 332 keV能量峰的能量分辨率为1.8 keV;152Eu特征能量峰与相应道址的线性拟合参数R2=0.999 993。该系统可满足高能量分辨率γ能谱测量要求。

     

    Abstract: In order to meet the requirement of γ spectrometry for high energy resolution, a HPGe γ spectrometry based on digital pulse shaping technology was designed. The HPGe γ spectrometry with the full energy scale of 8 192 channels, consists of front-end circuit, digital pulse processing module and upper computer software. The design of front-end circuit and the selection of the digital pulse shaping parameters in the digital pulse processing module were introduced. Meanwhile, the sources of 60Co, 134Cs, 137Cs and 152Eu were applied to test the HPGe γ spectrometry. The test results show that the energy resolution for 1 332 keV peak of 60Co is 1.8 keV. The linear fitting factor R2 between peaks of 152Eu and their corresponding channels can reach 0.999 993. The designed HPGe γ spectrometry can meet the requirement of γ spectrometry for high energy resolution.

     

/

返回文章
返回