Study on HPGe γ Spectrometry Based on Digital Pulse Shaping Technology

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.