多晶碘化汞探测器的制备及性能  

Fabrication and Performance of Polycrystalline Mercuric Iodide Detector

作　　者：徐环[1] 史伟民[1] 雷平水[1] 林飞燕[1] 郭余英[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《半导体光电》2007年第2期191-194,共4页Semiconductor Optoelectronics

摘　　要：碘化汞(HgI2)晶体由于原子序数高、禁带宽、密度大,制成低能γ射线和X射线探测器不需液氮冷却就能得到相当好的能量分辨率,且有相当高的探测效率。制备了多晶HgI2探测器,结果显示所得器件在室温下对5.9 keV的55Fe X射线和5.5 MeV的241Amα粒子具有较好的能量分辨率,分别为0.24 keV和0.72 MeV(未使用准直器)。Mercuric Iodide （HgI2） is one of the preferred material for the fabrication of X-ray and Gamma-ray detector. Thanks to the relative high atomic number, high density and wide band-gap,HgI2 detector possesses sharp energy resolution and high detection efficiency without cryogenic cooling. The technique of fabricating polycrystalline HgI2 detectors was studied and the energy resolution of 0.24 keV for 5.9 keV ^55Fe X-ray and 0.72 MeV for 5.5 MeV ^241Am Gammarays at room temperature was obtained.

关 键 词：碘化汞 探测器 多晶 能量分辨率 

分 类 号：O782.7[理学—晶体学]