In the PE spectra of NH3, three (2+2) REMPI and (2+2)+1 ATI, (2+2)+2 ATI were shown, within each peak a progression of stretching vibrations v1 were found.

• 氨的光电子能谱显示了（2＋2）REMPI和（2＋2）＋1 ATI、（2＋2）＋2 ATI三组电子峰，每组峰又包括伸缩振动v1的带系，ATI峰的振动布居出现反转。