电子衍射

This article has introduces the basic components and characteristics of a femoto-second electron diffraction system, i.e.

主要介绍了飞秒电子衍射系统的组成及设计指标。

According to the different orientations of domain walls with respect to the (100) observation plane of a foil, 90°domain boundaries may be divided into two kinds. one is thin lens or ring shaped a-a 90°domain boundary, and the domain wall lies on the {110} plane; Usually, most of these domain boundaries are uncharged; according to the extinction rules for the (011) domain walls, the displacement vector 〓 along 〓 can be dertermined, which is parallel to the line of intersection between the domain wall and the plane consisting of spontaneous polarization vectors on both sides of domain boundary; from selected area electon diffraction of crystals including domain boundary, we not only examine slight difference in the crystal parts on both sides of the domain boundary, but also obtain crystallographic relationship between them, that is, there exists a 180°rotation symmetry operator along a normal of domain wall. The other is Z or ring shaped a-c 90°domain boundary along {010} direction, and the displacement vector 〓 runs along 〓 direction.

根据界面相对于样品中(100)观测面取向的不同，90°畴可分为两类：一类为薄透镜片状或环状的a-a90°畴，其界面平行于{110}，多数不带电，由消光规律可确定其位移矢量平行于畴界面与自发极化所在平面的交迹，即，〓方向，而从包含畴界的选区电子衍射图可知，这种不带电的90°畴界两侧存在微小的取向差，其界面两侧的结晶学关系为以界面法线为二次轴的旋转关系；另一类为Z状或环状的a-c90°畴，其界面平行于[010]或[001]，相应的位移矢量为〓方向。

The growth of perylene and tetracene on Ag (110) has been studied by the ultraviolet photoemission spectroscopy and low-energy electron diffraction.

利用紫外光电子能谱和低能电子衍射对银( 110 )表面上perylene与tetracene的生长进行了研究。

The polytype of crystolon occuring in the South of LIAO NING diamond deposit has been analyzed and identified with convergent beam electron diffraction.

采用会聚束电子衍射的方法对我国辽南金伯利岩中的碳化硅矿物多型性进行了分析鉴定，通过对其结构的分析以及HOLZ环半径的计算，发现了6H以及4H两种多型。

The microstructure of subsonic speed flame spraying WC/Ni metal-ceramic coating has been studied by means of X-ray,scanning electron microscopy,transmitting electron microscopy and selected area electronic diffraction techniques etc.

采用X 射线、扫描电镜、透射电镜及选区电子衍射等手段研究了镍包碳化钨金属陶瓷亚音速火焰喷涂层的微观组织结构。

The selected area electron diffraction pattern also shows that the epi-layer is 3C-SiC film with a zinc blende structure,and the calculated lattice constant is 0.4362nm.

选区电子衍射花样标定结果再次说明外延薄膜为闪锌矿结构的3C-SiC，计算的晶格常数为0.4362nm。

After this dissolusion of cover-layer, the micro-holes with nanometer diameter appear and a thin film of AlPO〓·XH〓O on the porous alumite film is formed which can be found by using electronic diffraction technology.

电子衍射分析表明，经磷酸处理后，铝阳极氧化膜表面形成了一层AlPO〓·XH〓O薄膜。

According to the electrical diffraction of the conglomeration, the particles are A-zeolite crystals. In the surface of micro-crystal of A-zeolite, the cuboidal nano-crystal A-zeolite grows, so A-zeolite crystal steps can be observed with TEM.

同时，在A型沸石的晶化初期，样品的TEM照片中可见许多团聚体，部分团聚体表现为A型沸石所具有的立方体形态，根据电子衍射测定，构成团聚体的颗粒为大量的纳米晶体。

The inheritance phenomenon of precipitated V_4C_3 in martensitic transformation has been investigated by means of electron diffraction and matrix analysis.

本文利用电子衍射和矩阵分析方法探讨了析出V_4C_3在马氏体相变中的遗传现象。

The algorithm is based on the tensor expression of the second-order nondegenerate perturbation formulae of Bloch wave method of many-beam dynamically diffraction theory.

这些数据以被收录到新版《X-射线国际晶体学表》的C卷中。完善了高能电子衍射的非简并微扰理论的张量表述。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。