New avenues in x-ray microbeam experiments
New avenues in x-ray microbeam experiments
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X 射线微束实验的新途径
DOI：
10.1088/0034-4885/63/3/201
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发表时间：
2000
影响因子：
18.1
通讯作者：
C. Riekel
中科院分区：
文献类型：
--
作者：
C. Riekel
第三代同步辐射光源的高亮度使其在X射线显微衍射和微小角散射方面有了新的应用。通常会使用低至约1微米的光束大小，而亚微米的光束大小正在出现。扫描衍射法可以用来检查像单纤维一样的样品，而不需要像透射式电子散射实验那样进行切片。例子主要取自弱散射聚合物和生物聚合物。在单晶衍射中，无机晶体的晶体体积已达到亚微米3。蛋白质结晶学已经证明，线性晶体尺寸只有十分之几微米，这可以减少许多蛋白质的结晶时间。
The high brilliance of third-generation synchrotron radiation sources allows new applications in x-ray microdiffraction and microsmall-angle scattering. Beam sizes down to about one µm are routinely used and sub-µm beam sizes are becoming available. Scanning diffractometry can be used to examine samples like single fibres without the necessity for sectioning, as is required for transmission electron scattering experiments. Examples are taken principally from weakly scattering polymers and biopolymers. In single-crystal diffraction, sub-µm3 crystal volumes have been reached for inorganic crystals. Protein crystallography has been demonstrated for a few tenths of µm linear crystal size, which reduces the crystallization time for many proteins.