L3-EDGE ANOMALOUS SCATTERING OF X-RAYS BY PRASEODYMIUM AND SAMARIUM
L3-EDGE ANOMALOUS SCATTERING OF X-RAYS BY PRASEODYMIUM AND SAMARIUM
复制标题
镨和钐对 X 射线的 L3 边缘异常散射
DOI：
10.1021/ja00523a057
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发表时间：
1980
影响因子：
15
通讯作者：
R. Phizackerley
中科院分区：
文献类型：
--
作者：
L. K. Templeton;D. H. Templeton;R. Phizackerley
报道了Pr和Sm原子在波长通过其L/子3/吸收边对X射线的反常散射的测量结果。利用同步辐射的衍射实验得到了反常散射的实部和虚部f‘和f’的值。这两个组分在很窄的波长范围内都表现出非常大的变化，这为解决晶体结构分析中的位相问题提供了有用的工具。八水乙二胺四乙酸钠和同构的钐的晶体在非中心空间群Fdd2中结晶。原子坐标和热参数用Mo K.帽α.辐射。绘制并列出为异常散射项找到的值，以及每个数据集的相应R值。对于每个数据组，f‘呈现出在吸收曲线中观察到的显著的共振线。图1，表2。
Measurements are reported for the anomalous scattering of x-rays by atoms of praseodymium and samarium at wavelengths through their L/sub 3/ absorption edges. Values of both f' and f'', the real and imaginary components of the anomalous scattering, were derived from diffraction experiments using synchrotron radiation. Both components exhibit exceptionally large changes in a narrow interval of wavelength, changes which offer a useful tool for solving the phase problem in crystal structure analysis. Crystals of sodium praseodymium ethylenediaminetetraacetate octahydrate and the isomorphorphous samarium, crystallize in the noncentric space group Fdd2. The atomic coordinates and thermal parameters were determined using Mo K..cap alpha.. radiation. The values found for the anomalous scattering terms are plotted, and listed, with the respective R values for each data set. For each data set, f' exhibits the striking resonance line which is observed in the absorption curves. 1 figure, 2 tables.