漫 图 特征X射线谱（特征辐射） First observed by Barkla Sadler in1909 7 特征时 6 5 351 Mo 25 连续钢针 15 40 5 0.2 0.3 短放叙 nm 工程学院 School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering 特征X射线谱(特征辐射) Mo First observed by Barkla & Sadler in 1909