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High-energy X-ray diffraction studies of non-crystalline materials

机译:非晶态材料的高能X射线衍射研究

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摘要

High-energy (E greater than or equal to 30 keV) X-ray diffraction with the latest generation synchrotron sources as well as the introduction of advanced insertion devices: wiggler and undulator, has created new approaches to the quantitative study of the structure of non-crystalline materials because of several improvements: higher resolution in real space due to a wide range of Q, smaller correction terms (especially for absorption correction), reduction of truncation errors, the feasibility of running under extreme environments, including high-temperatures and high-pressures, and of obtaining a direct comparison between X-ray and neutron diffraction data. Recently, this technique has been combined with neutron diffraction with a pulsed source to provide more detailed and reliable structural information not previously available. This article reviews and summarizes recent results obtained from high-energy X-ray diffraction on several oxide glasses: SiO2, B2O3, MgP2O6 and PbSiO3, using bending magnet beamlines at Super Photon ring-8 (GeV) (SPring-8). In particular, it addresses the structural models of oxide glasses obtained by the reverse Monte Carlo (RMC) modelling technique using both the high-energy X-ray and neutron diffraction data. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 51]
机译:借助最新一代的同步加速器源进行高能(E大于或等于30 keV)X射线衍射,以及引入先进的插入装置:摆动和起伏器,为定量研究非结构化结构创造了新方法-晶体材料的多项改进:由于Q的范围宽,在实际空间中具有更高的分辨率,更小的校正项(特别是用于吸收校正),减少了截断误差,在极端环境(包括高温和高温)下运行的可行性压力,并获得X射线和中子衍射数据之间的直接比较。近来,该技术已经与具有脉冲源的中子衍射相结合,以提供以前没有的更详细和可靠的结构信息。本文回顾并总结了通过在Super Photon环8(GeV)(SPring-8)处使用弯曲的电磁束线在几种氧化物玻璃:SiO2,B2O3,MgP2O6和PbSiO3上通过高能X射线衍射获得的最新结果。特别地,它解决了通过反向蒙特卡洛(RMC)建模技术使用高能X射线和中子衍射数据获得的氧化物玻璃的结构模型。 (C)2001 Elsevier Science B.V.保留所有权利。 [参考:51]

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