A classroom demonstration of reciprocal space
A classroom demonstration of reciprocal space
复制标题
交互空间的课堂演示
DOI：
10.1119/1.4773979
复制
发表时间：
2013
影响因子：
0.9
通讯作者：
J. Thomsen
中科院分区：
文献类型：
--
作者：
Morten Madsen;Louise Høpfner;N. Rasmussen;Mikkel Stolborg;J. Nygård;R. Feidenhans'l;J. Thomsen
纳米线阵列和激光笔用于二维倒易空间的简单可视化。该实验可以在没有任何准备的情况下在任何教室进行。它有助于散射实验的教学，并说明电子、X 射线和中子散射的基本原理。通过将带有纳米线的样品安装在专为 X 射线散射设计的平台上，对衍射图样进行了详细研究。该设置非常适合本科生，他们在小型实验室而不是在大型设施中接受样本对齐培训。通过实验计算并监测样品 360° 旋转的衍射点的精确位置。通过拟合这组图像，可以确定人造晶体的晶格矢量，不确定度小于 1%。
An array of nanowires and a laser pointer are used for a simple visualization of two-dimensional reciprocal space. The experiment can be performed without any preparation and in any classroom. It aids the teaching of scattering experiments, and illustrates the underlying principles of electron, x-ray, and neutron scattering. A detailed study of the diffraction pattern was performed by mounting the sample with nanowires on a stage designed for x-ray scattering. The setup is well suited for undergraduate students, who get training in sample alignment in a small lab instead of at a large-scale facility. The exact positions of the diffraction spots are calculated and monitored experimentally for a 360° rotation of the sample. By fitting to this set of images, it is possible to determine the lattice vectors of the artificial crystal with an uncertainty of less than 1%.