X-RAY-DETECTION USING BULK GAAS

被引：18

作者：

HOLLAND, AD ^{[1
]}

SHORT, ADT ^{[1
]}

CROSS, T ^{[1
]}

机构：

[1] EEV LTD, CHELMSFORD, ENGLAND

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1994年 / 346卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(94)90724-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Bulk GaAs has been investigated as a material for X-ray detection nominally in the 10-100 keV band using Schottky barrier detectors. The devices which were manufactured were investigated with respect to leakage current, charge collection efficiency and X-ray spectral resolution. A leakage current of 7 nA mm-2 at 20-degrees-C was measured and was not attributable to surface leakage. The X-ray charge collection efficiency was variable but was as high as 70%, due to defects in the bulk material and was a strong function of detector thickness and applied bias. The imperfect CCE results in degraded spectral resolution, however the work indicates that this type of detector can perform moderate spectroscopy for X-rays of energy > 14 keV, with a measured FWHM of 4.5 keV at 60 keV and 5.5 keV at 122 keV.

引用

页码：366 / 371

页数：6

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