特征X射线谱（特征辐射） 11 10 First observed by Barkla Sadler in 1909 特征时 6 5 Mo 3 25 连续钢射 3 20 2 15 10 5 0.2 短放特征X射线谱(特征辐射) Mo First observed by Barkla & Sadler in 1909