|Table of Contents|

Influential factors of spectral characteristics of quasihemispherical CdZnTe detectors(PDF)

《南京理工大学学报》（自然科学版）[ISSN:1005-9830/CN:32-1397/N]

Issue:
2017年06期
Page:
769-
Research Field:
Publishing date:

Info

Title:
Influential factors of spectral characteristics of quasihemispherical CdZnTe detectors
Author(s):
Zhang Yuqian; Fu Li
Key Laboratory of Radiation Detection Materials and Devices of Ministry of Industry andInformation Technology,Northwestern Polytechnical University,Xi’an 710072,China
Keywords:
CdZnTe;  quasi hemispheric detectors;  spectral characteristics;  finite element software;  energy resolution;  peak to Compton ratio
PACS:
TN304.2
DOI:
10.14177/j.cnki.32-1397n.2017.41.06.017
Abstract:
The spectral responses of quasi hemispherical CdZnTe(CZT)detectors to 137Cs@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 137Cs@662 keV detector is 1.17%,and the peak to Compton ratio is 6.86.

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Last Update: 2017-12-31