七十年代初,Willing等人首先用碘化汞晶体制得了室温核辐射探测器。迄今,碘化汞晶体已发展为制备室温核辐射探测器的重要材料之一,近年来对此材料的研究仍十分活跃。 用HgI_2晶体制备核探测器首先要求材料的纯度要高。近来,人们注意到此材料与准化学计量比的偏离是影响探测器性能的重要因素。 为获得高纯HgI_2晶体,我们采用了高纯元素直接合成,继而气相生长的方法。文献中虽也提到元素合 In the early 1970s, Willing et al. First made a room temperature nuclear radiation detector with a mercury iodide crystal. Hitherto, the crystal of mercuric iodide has been developed as one of the important materials for the preparation of room temperature nuclear radiation detectors. In recent years, the research on this material has been very active. The preparation of nuclear detectors with HgI 2 crystals requires firstly the higher purity of the material. Recently, it has been noticed that the deviation of this material from the quasi-stoichiometry is an important factor affecting the performance of the detector. In order to obtain high purity HgI 2 crystals, we have adopted a method of direct synthesis of high purity elements followed by vapor phase growth. Although the literature also mentions elements together