邻苯二甲酸氢钾(KAP)的同步辐射截面形貌术

本文叙述邻苯二甲酸氢钾(KAP)晶体内部不完整性(滑移位错等)的同步辐射截面形貌图的衬度研究工作。有关缺陷象衬度随波长增加而提高的实验事实同引用均匀畸变动力学的理论所引入的平均应变梯度参数β和βt_eff的理论计算结果,相当符合,它为应用同步辐射源来清晰显示单晶中有关缺陷,提供一个波长选择的依据。关键词：

THE SECTION TOPOGRAPHY OF SYNCHROTRON RADIATION (SST) ON THE CRYSTAL OF POTASSIUM ACID PHTHALATE (KAP)

The defect imaging contrast on the section topographs for the crystal of potassium acid phthalate (KAP) has been studied, using the synchrotron radiation. The experimental results show that the diffraction contrast due to defects in the crystal is considerably increased with the wavelength increasing in a certain range The dynamical theory of X-ray diffraction for homogeneously deformed crystals with average values of the strain gradient parameter βis taken to interpret the experimental results, for which the factor β t_eff plays an important role in the defect imaging contrast formation We propose that it is possible to choose an appropriate wavelength of synchrotron radiation which could give out higher diffraction contrast for defects in crystals.