在H—800型分析电子显微镜上,将微衍射技术(μ—diff)与电子能量损失谱(EELS)结合起来,发展了一项新的实验技术:微衍射模式下的电子能量损失谱技术。并用此方法获得了石墨沿〈100〉方向上的非弹性散射电子的电子能量损失谱。其谱形表明:在7ev和26ev处各有一等离子激发峰;根据这些峰,讨论了石墨的价电子结构。 A new experimental technique, the electron energy loss spectroscopy in micro-diffraction mode, has been developed by combining the micro-diffraction technique (μ-diff) with the electron energy loss spectroscopy (EELS) on the H-800 electron microscope. The electron energy loss spectra of inelastic scattering electrons along the <100> direction of graphite were obtained by this method. The spectrum shows that there is a plasma excitation peak at 7ev and 26ev respectively. Based on these peaks, the valence electron structure of graphite is discussed.