A.2 B.1 C.3/2 D.3/4
A.1和2/3 B.2和2/3 C.1和4/3 D.1和2
塞曼效應(yīng)中觀測到的π和σ成分,分別對應(yīng)的選擇定則為()
A.A B.B C.C D.D