南京理工大学学报（自然科学版）2017，Vol.41Issue(6)：769-772,4.DOI:10.14177/j.cnki.32-1397n.2017.41.06.017
准半球型CdZnTe探测器能谱特性的影响因素
Influential factors of spectral characteristics of quasi hemispherical CdZnTe detectors
张育潜 1傅莉1
作者信息
- 1. 西北工业大学 辐射探测材料与器件工业和信息化部重点实验室,陕西 西安710072
- 折叠
摘要
Abstract
The spectral responses of quasi hemispherical CdZnTe( CZT) detectors to 137 Cs@662 keV are simulated using finite element software GEANT4 and COMSOL and the Shockley-Ramo principle to solve the hole tailing problem. The simulation results show that,quasi hemispherical CZT detectors are fit for the (μτ) e of ( 1 ～10 ) × 10-3 cm2/V;the value of (μτ) h has less effect on the energy spectrum;when the difference between (μτ) h and (μτ) e is larger,the energy resolution is better,but the hole tailing problem appears gradually with (μτ) h increasing;spectrum characteristics improve with the (μτ) e of CdZnTe and the bias increasing. A quasi hemispherical CdZnTe detector with the size of 10 mm×10 mm×5mm is fabricated based on the theoretical calculation. Its energy resolution for 137 Cs@662 keV detector is 1. 17％,and the peak to Compton ratio is 6. 86.关键词
CdZnTe/准半球型探测器/能谱特性/有限元软件/能量分辨率/峰康比Key words
CdZnTe/quasi hemispheric detectors/spectral characteristics/finite element software/energy resolution/peak to Compton ratio分类
信息技术与安全科学引用本文复制引用
张育潜,傅莉..准半球型CdZnTe探测器能谱特性的影响因素[J].南京理工大学学报（自然科学版）,2017,41(6):769-772,4.
