Point Defects in Metals Studied by Hyperfine Interactions

本研究利用摄动角相关（PAC）技术来确定金属中缺陷的结构。具体而言，工作将涉及：(1)冷加工金属的研究，以测试空缺是否主要在相对随机的位置上高度相关的串中产生；(2)激光表面熔化金属再凝固过程中产生缺陷的研究；(3)研究识别特定的缺陷复合物并表征复合物的动态行为；(4)空位配合物中氢和氦俘获的研究；(5)金属间化合物缺陷的研究。

This research utilizes the Perturbed Angular Correlation(PAC) technique to determine the structure of defects in metals. In particular the work will treat: (1) studies in cold-worked metals to test whether vacancies are produced primarily in highly correlated strings on in relatively random locations; (2) studies of defects created during resolidification of laser surface melted metals; (3) studies to identify specific defect complexes and to characterize the dynamic behavior of the complexes; (4) studies of hydrogen and helium trapping in vacancy complexes; and (5) studies of defects in intermetallic compounds.