用剂量为5.74×1018cm-2的中子对MgO晶体进行了辐照,利用吸收光谱、荧光光谱等手段观测了中子辐照引起的损伤及其恢复.中子辐照产生了大量的阴离子单空位(F+)、阴离子双空位(F2)及其它更高阶的缺陷.通过等时退火,这些缺陷发生了一系列消长和转型的变化过程,并最终在900℃左右全部消失.实验结果表明,吸收峰位于573nm的色心是与位于424nm、451nm的色心类型不同的更高阶的阴离子空位聚集态.
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