NMR study of aging process of self-radiation damage in minor actinide dioxides

本文用~（17）O-NMR研究了次锕系元素二氧化物自辐射损伤的老化过程。在~（243）AmO_2中，我们观察到在一个月的短时间内，谱线形状发生了快速变化。结果表明，自辐射损伤在低温下迅速增加了系统的缺陷数，并且系统的电子基态对无序高度敏感。核磁共振数据还揭示了该系统中的短程，自旋玻璃状的字符的磁性转变。

Aging process of self-radiation damage in minor actinide dioxides has been investigated microscopically by means of 17O NMR. In 243AmO2, we have observed a rapid change of the NMR line shape over the short time interval of one month. The result demonstrates that the self-radiation damage rapidly increases the numbers of defect at low temperatures, and further, that the electronic ground state of the system is highly sensitive to the disorder. The NMR data have also revealed short-range, spin-glass-like character for the magnetic transition in this system.