Development of a CdTe thermal neutron detector for neutron imaging

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• 作者：Aki Miyake ; ^{ramiyak@ipc.shizuoka.ac.jp} ; Takahiro Nishioka ; Shailendra Singh ; Hisashi Morii ; Hidenori Mimura ; Toru Aoki
• 关键词：CdTe detector ; Thermal neutron detector ; Semiconductor detector
• 刊名：Nuclear Instruments and Methods in Physics Research Section A ; Accelerators ; Spectrometers ; Detectors and Associated Equipment
• 出版年：2012
• 期刊代码：41_01689002
• 类别：ph
• 出版时间：11 June, 2012
• 卷：677
• 期：Complete
• 页码：41-44
• 文件大小：367 K

摘要

A thin CdTe thermal neutron detector has been developed and its suitability for neutron imaging has been investigated. Simulations of the interaction of neutrons with a 0.5 mm-thick CdTe detector demonstrate the advantages of using 96 keV prompt gamma rays produced by neutron capture in ¹¹³Cd as a neutron event. Specifically, they provide a high spatial resolution and approximately the same detection efficiency as 558 keV prompt gamma rays, which are commonly used for detecting thermal neutrons in CdTe detectors. We fabricated a thin CdTe detector. Measurements using a ¹³³Ba gamma-ray source revealed that the detector has a gamma-ray energy resolution of 3 keV at 80 keV, while measurements using a ²⁵²Cf neutron source demonstrated that the CdTe detector has good neutron/gamma ray discrimination.