2.3.5 Excitation and Ionization of Gas Atoms

Under the effect of external factors,the electrons of an atom may transit to a higherenergy state,which is called excitation. Ionization is the phenomenon of releasingfree electrons from a neutral atom or molecule,which is the result of having certainener ......（本文共 6070 字 , 2 张图）     [阅读本文] >>