Chuang, S.Y.S.Y.ChuangCheng, J.H.J.H.ChengTseng, P.K.P.K.TsengChen, D.E.D.E.ChenJUNG-HO CHENG2020-01-132020-01-13198203759601https://scholars.lib.ntu.edu.tw/handle/123456789/447726Detection of a change in the oxidation state on aluminum surface using angular correlation of positron annihilation radiationjournal article10.1016/0375-9601(82)90546-1https://linkinghub.elsevier.com/retrieve/pii/0375960182905461