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相关概念视频

X-ray Crystallography02:18

X-ray Crystallography

24.2K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
24.2K
X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

4.0K
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
4.0K

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相关实验视频

Updated: Sep 11, 2025

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

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紧型X射线自聚合器使用动态Laue衍射.

Chaoqun Sun, Fugui Yang, Xiaowei Zhang

    Optics letters
    |August 15, 2025
    PubMed
    概括
    此摘要是机器生成的。

    我们开发了一种新的X射线自聚合器,使用厚厚的晶体进行精确的角度测量. 与传统方法相比,这种紧的设备提供了更高的灵敏度,推进了精密计量学.

    更多相关视频

    Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
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    Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography

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    High Pressure Single Crystal Diffraction at PX^2
    11:32

    High Pressure Single Crystal Diffraction at PX^2

    Published on: January 16, 2017

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    相关实验视频

    Last Updated: Sep 11, 2025

    Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
    10:12

    Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

    Published on: June 19, 2018

    9.2K
    Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
    10:18

    Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography

    Published on: February 21, 2017

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    High Pressure Single Crystal Diffraction at PX^2
    11:32

    High Pressure Single Crystal Diffraction at PX^2

    Published on: January 16, 2017

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    科学领域:

    • 物理 物理学 物理
    • 材料科学 材料科学 材料科学
    • 计量学 计量学是一门学科.

    背景情况:

    • 精确的角度测量对于先进的科学仪器至关重要.
    • 传统的自动聚合器在灵敏度和紧性方面存在局限性.

    研究的目的:

    • 推出一种新型的X射线自聚合器,用于超精确的角度测量.
    • 为了证明Laue衍射在厚晶体中用于角放大功能的有效性.

    主要方法:

    • 在厚的晶 (5毫米) 中利用Laue衍射.
    • 利用角放大和异常吸收效应.
    • 应用X射线衍射的动态理论.

    主要成果:

    • 对于 (220) 个平面,获得了142μm/μrad的灵敏度.
    • 性能比传统的自动聚合器大两倍.
    • 展示了一种紧且高度灵敏的测量设备.

    结论:

    • 开发的X射线自聚合器提供了前所未有的灵敏度和紧性.
    • 这项技术增强了同步辐射设施的精度计量技术.
    • 当与传统方法相结合时,它可以实现高灵敏度,广角测量.