加速器质谱测量26Al时,既可以引出Al-离子又可以引出AlO-分子离子。因为Mg不能形成稳定的负离子,通常引出Al-即不存在同量异位素26Mg的干扰。但因在Al2O3样品中引出AlO-比引出Al-效率高40倍,高效率的引出AlO-则同时引出了稳定的MgO-,要排除26Mg的干扰,用全剥离法可解决问题,但 When accelerator mass spectrometry is used for the measurement of 26Al, both Al-ions and AlO-ions can be extracted. Because Mg does not form a stable negative ion, it usually leads to Al, ie, there is no interference of isomorphic 26Mg. However, due to the A10 in the sample is more than 40 times higher than the Al-out, the high-efficiency extraction of AlO- leads to the stable MgO- at the same time. To eliminate the interference of 26Mg, the full peel-off method can solve the problem. However,