N2价轨道的精细电子动量谱学研究

An electron momentum spectroscopy investigation on valance orbitals of molecule N_2

在高分辨率(ΔE=0.8eV,Δp≈0.1a.u.)高效率的第三代电子动量谱仪上获得了N2价轨道的电离能谱和动量谱.通过对伴线结构的电子动量谱学(EMS)研究,得到了不同伴线结构的电子动量谱,另一方面也得到了伴线结构的强度.由伴线的电子动量分布形状判断出其跃迁的主要来源,并由实验测量的伴线结构强度确定了谱因子(极强度)的大小,通过对谱因子实验值与理论计算结果的比较检验了各种理论模型的精确度.

Detailed and accurate EMS measurements of complete valence region of N2 molecule using a high resolution（ΔE=0.8eV,Δp≈0.1 a.u.）high efficiency electron momentum spectrometer have been performed.Several ionization peaks attributed to inner valence orbitals and correlation（satellite）states are resolved for the first time in the binding energy spectroscopy.By comparing the（e,2e）cross sections of valence orbitals and the correlations states,significant insights into the dominant character of the valence and correlation states of N2 are obtained.The EMS momentum distributions show that they provide a sensitive test for orbital wavefunctions from different theoretical models.