中子三轴谱仪是最早被发明,同时也是应用最广泛的中子散射谱仪之一.它利用了单色器、样品、和分析器3个转动轴的原理,使测量时可以直观地观测倒空间和能量空间的某一个点的散射性质,因此非常适合研究固体中的各种元激发.简单介绍了三轴谱仪的基本原理,然后给出一些三轴谱仪应用的例子.在这些例子中,既包括弹性散射也包括非弹性散射,例如铜单晶中的声子谱,非常规超导体中的磁共振峰,PrOs4As12中的晶格场,以及单层锰氧化合物Pr(1-x)Ca(1+x),MnO4中的漫散射.
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