Jeanguillaume C, Colliex C, Ballongue P, Tenc e M
Laboratoire de Physique des Solides, CNRS URA 002, Universit e Paris Sud, Orsay, France.
Ultramicroscopy. 1992 Sep;45(2):205-17. doi: 10.1016/0304-3991(92)90510-q.
With its specific design for recording simultaneous signals, the scanning transmission electron microscope (STEM) offers unique imaging capabilities. In order to use them fruitfully, we have implemented, on a VG STEM equipped with a magnetic spectrometer, home-made detectors for recording multisignal images. This paper first describes a method developed for the quantitative evaluation of detection efficiency of all data-acquisition channels involved in these multisignal images. At this stage, new imaging modes become accessible, which can be classified following their specificity and sensitivity; scattering power image, elastic and inelastic images mean free path ratio images. Original applications encountered in the biological as well as in the materials science fields illustrate the possibilities of these various approaches, which can be of great interest in quantitative microscopy, analytical imaging or low-dose observation.
扫描透射电子显微镜（STEM）凭借其用于记录同步信号的特殊设计，提供了独特的成像能力。为了有效利用这些能力，我们在配备磁谱仪的VG STEM上，安装了用于记录多信号图像的自制探测器。本文首先描述了一种用于定量评估这些多信号图像中所有数据采集通道检测效率的方法。在此阶段，可以获得新的成像模式，这些模式可根据其特异性和灵敏度进行分类：散射功率图像、弹性和非弹性图像、平均自由程比图像。在生物学和材料科学领域遇到的原始应用说明了这些不同方法的可能性，这些方法在定量显微镜、分析成像或低剂量观察中可能具有很大的意义。
