Diffraction on disordered materials using 'neutron-like' photons
Diffraction on disordered materials using 'neutron-like' photons
复制标题
使用“类中子”光子对无序材料进行衍射
DOI：
10.1088/0031-8949/1995/t57/019
复制
发表时间：
1995
期刊：
影响因子：
2.9
通讯作者：
H. Poulsen
中科院分区：
文献类型：
--
作者：
J. Neuefeind;H. Poulsen
在过去，光子衍射主要是利用来自X射线管的特征辐射在大约820 keV的能量范围内进行的。比较这些实验与中子衍射的结果是困难的，因为在这个能量范围内的光电吸收是主要的过程。光电吸收随着λ3而减小，因此将能量增加到约100 keV对吸收系数具有剧烈影响。现代同步辐射光源可以方便地获得高能光子。高能光子衍射具有另外的优点，例如更大的可达Q范围、减小的校正项和小的散射角。我们在这里报告的玻璃SiO2和液体N-甲基甲酰胺（NMF）的可行性研究。
In the past photon diffraction has been carried out mainly using the characteristic radiation from x-ray tubes in the energy range from about 820keV. Comparison of these experiments with neutron diffraction results is difficult since in this energy range the photoelectric absorption is the predominant process. The photoelectric absorption decreases with λ3, so increasing the energy to about 100keV has a drastic effect on the absorption coefficient. Photons in the high energy range can be obtained conveniently from modern synchrotron sources. High energy photon diffraction has additional further advantages, e.g. the larger accessible Q-range, the diminishing correction terms and the small scattering angles. We report here on a feasibility study on glassy SiO2 and liquid N-Methylformamide (NMF).