Reflection high-energy electron diffraction

（重定向自RHEED）

$Figure 1. Systematic setup of the electron gun, sample and detector /CCD components of a RHEED system. Electrons follow the path indicated by the arrow and approach the sample at angle θ. The sample surface diffracts electrons, and some of these diffracted electrons reach the detector and form the RHEED pattern. The reflected (specular) beam follows the path from the sample to the detector.$

$Figure 2. A RHEED pattern obtained from electron diffraction from a clean TiO2 (110) surface. The bright spots indicate where many electrons reach the detector.$

$Figure 3. The RHEED construction of the Ewald's Sphere at the sample surface. The radius of the Ewald's sphere is equal to the magnitude of the k0 vector, which is the reciprocal of the wavelength of the incident electrons. The k vector, corresponds to an allowed diffraction condition, and the G vector is the difference between the k and k0 vectors. In this figure, the k vector is the specular beam.$

$Figure 4. Diffraction from a row of atoms a Laue circle on the surface of the Ewald's sphere. The reciprocal lattice rods are so closely space, that they comprise the plane cutting the sphere. Diffraction conditions are fulfilled on the perimeter of the Laue circle. The vectors are all equal to the reciprocal of the incident vector, k.$

Reflection high-energy electron diffraction (RHEED) is a technique used to characterize the surface of crystalline materials. RHEED systems gather information only from the surface layer of the sample, which distinguishes RHEED from other materials characterization methods that also rely on diffraction of high-energy electrons. Transmission electron microscopy, another common electron diffraction method samples the bulk of the sample due to the geometry of the system. Low-energy electron diffraction (LEED) is also surface sensitive, but LEED achieves surface sensitivity through the use of low energy electrons.

词汇	RHEED
分类	英语词汇英语翻译词典
释义	RHEED /ri:/ 英汉-汉英词典 abbr. Reflection High Energy Electron Diffraction 反射高能电子衍射词组 \| 习惯用语您要查找的是不是： reed n. 芦苇；簧片；牧笛；不可依靠的人 vt. 用芦苇盖；用芦苇装饰 heed vi. 注意，留心 n. 注意到；留心到 hedger n. 种植树篱者；两方下注者；骑墙派；作套期保值的人；推卸回避的人 RHE n. 流值（流度绝对单位） abbr. 远地前端（Romote Head End） RHEED abbr. 反射高能电子衍射（Reflection high-energy electron diffraction）网络短语: Rheed O'dell 标签 LEED and RHEED 低能电子衍射和反射式高能电子衍射 RHEED reflection high-energy electron diffraction 反射高能电子衍射英语百科 Reflection high-energy electron diffraction （重定向自RHEED） $Figure 1. Systematic setup of the electron gun, sample and detector /CCD components of a RHEED system. Electrons follow the path indicated by the arrow and approach the sample at angle θ. The sample surface diffracts electrons, and some of these diffracted electrons reach the detector and form the RHEED pattern. The reflected (specular) beam follows the path from the sample to the detector.$ $Figure 2. A RHEED pattern obtained from electron diffraction from a clean TiO2 (110) surface. The bright spots indicate where many electrons reach the detector.$ $Figure 3. The RHEED construction of the Ewald's Sphere at the sample surface. The radius of the Ewald's sphere is equal to the magnitude of the k0 vector, which is the reciprocal of the wavelength of the incident electrons. The k vector, corresponds to an allowed diffraction condition, and the G vector is the difference between the k and k0 vectors. In this figure, the k vector is the specular beam.$ $Figure 4. Diffraction from a row of atoms a Laue circle on the surface of the Ewald's sphere. The reciprocal lattice rods are so closely space, that they comprise the plane cutting the sphere. Diffraction conditions are fulfilled on the perimeter of the Laue circle. The vectors are all equal to the reciprocal of the incident vector, k.$ Reflection high-energy electron diffraction (RHEED) is a technique used to characterize the surface of crystalline materials. RHEED systems gather information only from the surface layer of the sample, which distinguishes RHEED from other materials characterization methods that also rely on diffraction of high-energy electrons. Transmission electron microscopy, another common electron diffraction method samples the bulk of the sample due to the geometry of the system. Low-energy electron diffraction (LEED) is also surface sensitive, but LEED achieves surface sensitivity through the use of low energy electrons.
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RHEED /ri:/

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网络短语:

Reflection high-energy electron diffraction