Point Defects in Metals Studied by Hyperfine Interactions

这项研究利用微扰角相关(PAC)技术来确定金属中缺陷的结构。这项工作将特别涉及：(1)对冷加工金属的研究，以测试空位是否主要在相对随机的位置上以高度相关的串形式产生；(2)对激光表面熔化金属的再结晶过程中产生的缺陷的研究；(3)确定特定缺陷复合体和表征该复合体的动态行为的研究；(4)对空位复合体中氢和氦的捕获的研究；以及(5)对金属间化合物中的缺陷的研究。

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.