Characterization of CdMnTe Planar Nuclear Detectors Grown by Vertical Bridgman Technique
Characterization of CdMnTe Planar Nuclear Detectors Grown by Vertical Bridgman Technique
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DOI：
10.1109/nss/mic42101.2019.9059615
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
S. Egarievwe;U. Roy;E. Agbalagba;Keiandrea L. Dunning;Oghaghare K. Okobiah;Mordecai B. Israel;Mebougna L. Drabo;R. James
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文献类型：
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作者：
S. Egarievwe;U. Roy;E. Agbalagba;Keiandrea L. Dunning;Oghaghare K. Okobiah;Mordecai B. Israel;Mebougna L. Drabo;R. James
碲化锰镉（CdMnTe）晶体由于Mn在CdTe中的分凝系数（约为1.0）而被预期在结构上是均匀的。这可以转化为无缺陷的大体积CdMnTe晶体的生长，这些缺陷目前限制了X射线和伽马射线的检测效率。目前的表征实验显示垂直布里奇曼技术生长的CdMnTe平面探测器的结果。实验中所用的CdMnTe晶体大多没有碲包裹体和高角度晶界。我们记录了一个能量分辨率为9.2%FWHM为59.5 keV的241 Am的伽玛峰的平面探测器。我们还解决了低于59.5 keV峰的能量峰。
Cadmium manganese telluride (CdMnTe) crystals are expected to be homogenous in structure due to the segregation coefficient of Mn in CdTe, which is about 1.0. This could translate in the growth of large-volume CdMnTe crystals free of defects that currently limit X-ray and gamma-ray detection efficiencies. The present characterization experiments show results on CdMnTe planar detectors grown by the vertical Bridgman technique. The CdMnTe crystal used in the experiments was mostly free of tellurium inclusions and highangle grain boundaries. We recorded an energy resolution of 9.2% FWHM for the 59.5-keV gamma-peak of 241Am for the planar detector. We also resolved peaks at energies below the 59.5-keV peak.