arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1602.09034cond-mat.mtrl-scicond-mat.mes-hallcond-mat.otherphysics.comp-phphysics.ins-det
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SUePDF:一个从电子衍射数据获得定量电子对分布函数的程序

SUePDF: a program to obtain quantitative pair distribution function from electron diffraction data

Dung Trung Tran, Gunnar Svensson, Cheuk-Wai Tai

摘要:

SUePDF是一个用MATLAB编写的图形用户界面程序,用于从电子衍射数据中获得定量的成对分布函数(PDF)。该计划促进了基于透射电子显微镜(TEM)的电子衍射数据的无定形材料和小纳米颗粒的结构研究。它是基于电子散射物理学以及总散射方法。本文介绍了一种背景模拟方法来处理直射光束、非弹性散射和非相干多次散射的强度拖尾。运动学电子散射强度的比例使用电子散射因子。傅立叶变换后获得的PDF相对于数量密度、纳米颗粒形状因子和概率密度的非负性进行归一化。SUePDF作为学术用户的免费软件分发。

英文摘要:

SUePDF is a graphic-user-interface program written in MATLAB to achieve quantitative pair distribution functions (PDF) from electron diffraction data. The program facilitates the structural studies of amorphous materials and small nanoparticles based on electron diffraction data from transmission electron microscopes (TEMs). It is based on the physics of electron scattering as well as the total scattering methodology. A method of background modelling is introduced to treat the intensity tail of the direct beam, inelastic scattering and incoherent multiple scattering. Kinematical electron scattering intensity is scaled using the electron scattering factors. The PDFs obtained after Fourier transforms are normalized with respect to number density, nanoparticle form factor, and the non-negativity of probability density. SUePDF is distributed as free software for academic users.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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