以目前国际上极为活跃开展的暗物质探测、无中微子双β衰变研究为例，评述了高纯锗探测器的重要性及其广泛的应用前景。介绍了己开展的高纯锗单晶、探测器制备的关键技术研究进展：合作单位已研制出了用于高纯锗单晶材料制备的区熔炉、单晶炉；并制备出直径为20～50 cm、纯度为12N(<4×1011 atoms/cm3)、位错<5000 atoms/cm2的锗单晶；掌握了高纯锗探测器(平面型、同轴型)制备的关键技术，用进口高纯锗单晶材料制备出的同轴型高纯锗探测器对γ射线的能量分辨率及探测效率均达到进口产品指标，使用自制的12N高纯锗单晶材料己制备出平面型高纯锗探测器。呼吁加速高纯锗研制的自主创新步伐，尽早实现其国产化目标。
The article reviews importance and wide applications of HPGe detector, especially the application on the dark matter search experiment and double beta decay experiment. The research progress on the High-purity germanium single crystal and HPGe detector in China has been introduced. The cooperation partner developed new type zone-refining furnace and single crystal furnace. The ultra-purity germanium single crystal with 20～50 cm, purity up to 12N(net impurity concentration is less than 4 × 1011 atoms/cm3), and dislocation less than 5 000 /cm3 was prepared. The key technologies for preparing planar and coaxial HPGe detector were mastered. The coaxial detector, which has been made of imported ultra-purity germanium single crystal has excellent energy resolution and e?ciency as the imported commercial detector. The planar detector using self-made germanium single crystal was also successfully manufactured. The research group appeals for speeding up the pace of independent innovation on the high-purity germanium, and achieving the high-purity germanium localization as soon as possible.
参考文献
| [1] | Armengaud, E..Direct detection of WIMPs[J].Comptes rendus. Physique,20126/7(6/7):730-739. |
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