Investigation of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection
Investigation of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection
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DOI：
10.1007/s11664-009-1050-6
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发表时间：
2010-01
影响因子：
2.1
通讯作者：
G. Yang;A. Bolotnikov;L. Li;G. Camarda;Y. Cui;A. Hossain;K. Kim;V. Carcelén;R. Gul;R. James
中科院分区：
文献类型：
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作者：
G. Yang;A. Bolotnikov;L. Li;G. Camarda;Y. Cui;A. Hossain;K. Kim;V. Carcelén;R. Gul;R. James
碲锰镉（CMT）是一种很有潜力的室温核辐射探测器材料。我们研究了从铸锭的稳定生长区中取出的掺铟CMT晶体，并将其特性与从最后凝固区中取出的晶体进行了比较。我们采用了不同的技术，包括同步辐射白光X射线形貌术（SWBXT），电流-电压（I-V）测量，和低温光致发光光谱，我们还评估了它们的响应作为辐射暴露的检测器。从稳定生长区的晶体被证明是上级从最后冻结区，它是一个单晶粒晶体，免费的孪晶，并显示了高一个数量级的电阻率。铟掺杂剂在铸锭中的偏析可能是其较好的电阻率的原因。此外，我们记录了良好的响应，其（μτ）值为2.6 × 10− 3cm 2/V，这是可以接受的薄探测器，包括它们在医学上的应用。
Cadmium manganese telluride (CMT) has high potential as a material for room-temperature nuclear-radiation detectors. We investigated indium-doped CMT crystals taken from the stable growth region of the ingot and compared its characteristics with that from the last-to-freeze region. We employed different techniques, including synchrotron white-beam x-ray topography (SWBXT), current–voltage (I–V) measurement, and low-temperature photoluminescence spectra, and we also assessed their responses as detectors of radiation exposure. The crystal from the stable growth region proved to be superior to that from the last-to-freeze region; it is a single-grain crystal, free of twins, and displayed a resistivity higher by one order of magnitude. The segregation of indium dopant in the ingot might be responsible for its better resistivity. Furthermore, we recorded a good response in the detector fabricated from the crystal taken from the stable growth region; its (μτ)evalue was 2.6 × 10−3cm2/V, which is acceptable for thin detectors, including their application in medicine.