Influence of Ring Length on Electric Field Distribution in CdZnTe Frisch-Ring Detector

Jie Ren; Li Fu; Ling Bao Meng

doi:10.4028/www.scientific.net/MSF.695.513

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HomeMaterials Science ForumMaterials Science Forum Vol. 695Influence of Ring Length on Electric Field...

Influence of Ring Length on Electric Field Distribution in CdZnTe Frisch-Ring Detector

Abstract:

The CdZnTe (CZT) devices with various screening depth in dimensions 3×3×6mm³ were fabricated. The influence of Ring length (screening depth) and length of crystal on the electric field distribution in CZT devices has been explored by finite element method. The results indicated that ring length (screening depth) plays an important role on the detecting performance of CZT Frisch-ring devices. Longer screening depth gives rise to an electric field which is compressed more greatly. Measured spectra indicated that extreme compressed electric field could reduce detecting resolution. A FWHM energy resolution of approximately 3.71% at 662 keV was obtained for a device with dimensions 3×3×6mm³ and 4.8mm screening depth.

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Periodical:

Materials Science Forum (Volume 695)

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513-516

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.695.513

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Online since:

July 2011

Authors:

Jie Ren, Li Fu, Ling Bao Meng

Keywords:

CdZnTe Frisch Grid Detector, Electric Field Distribution, Energy Resolution, Finite Element (FE) Simulation

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