High flux X-ray response of composite mercuric iodide detectors

被引：44

作者：

Schieber, M ^{[1
]}

Zuck, A ^{[1
]}

Melekhov, L ^{[1
]}

Shatunovsky, R ^{[1
]}

Hermon, H ^{[1
]}

Turchetta, R ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, IL-91904 Jerusalem, Israel

来源：

HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS | 1999年 / 3768卷

关键词：

imaging; x-ray; polycrystalline mercuric iodide; medical digital radiology;

D O I：

10.1117/12.366594

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A theoretical model is presented which analyses the sensitivity of composite detectors to a flux of X-rays emerging from a radiological x-ray generator. The model describes the mam factors which influence the x-ray response, for the case where the detector is composed of several layers of crystallites separated by a polymeric glue (binder) as is the case of composite HgI2 detectors fabricated by the screen print method (SP-HgI2). The model also describes the variation of the sensitivity with grain size and dielectric constant, taking into account the dielectric constant of the binder showing also the experimental results. Finally, the experimental results of the sensitivity vs, the voltage is shown for single crystal and composite HgI2 detectors and these results are compared with polycrystalline PbI2 and a-Se, which are the main material candidates for medical digital radiology.

引用

页码：296 / 309

页数：14

共 22 条

[1] MECHANISM OF PHOTOCONDUCTIVITY IN MICROCRYSTALLINE POWDERS [J].