NOBEL PRIS 1915 Sir William Henry Bragg (1862-1942) father Sir William Lawrence Bragg (1890-1871)s son Bragg's Law 1913 SVERIGE WHBRAGG Nobel Prize in Physics 1915 WLBRAGG Diffraction geometry Leyun Wang
Diffraction geometry Sir William Henry Bragg (1862-1942) father Sir William Lawrence Bragg (1890-1871) son Bragg’s Law 1913 Nobel Prize in Physics 1915 Leyun Wang
Interaction of X-ray with a substance F(滤波片) 丛m 热 F lo tswL」 入0 透射X射线1-l0e-HmP:,A-o U 「入=0，相干散射 散射X射线 1 1>0 反冲电子 不相干散射 电子{ 10 俄歇电子 光电子 光电效应 俄歌效应 茨光X射线1KaPA0 2 1.6 题藏很 1.4 1/nm A(A)
Interaction of X-ray with a substance
Interaction of X-ray with a substance F(滤波片) 丛m 热 lo tSwL」 Ao 透射X射线1-loe-"mP、A-o U 「入=0，相干散射 散射X射线 1 1'>0 反冲电子 不相干散射 电了{ 俄歇电子 (光电子 光电效应 俄歌效应 荧光X射线1Ka>A日 When propagating X-rays meet tight-binding electrons, classical coherent scattering occurs
Interaction of X-ray with a substance When propagating X-rays meet tight-binding electrons, classical coherent scattering occurs
Diffraction geometry ·Bragg'slaW ·More on Bragg'slaW ·Ewald sphere method Practical X-ray diffraction methods
Diffraction geometry • Bragg’s law • More on Bragg’s law • Ewald sphere method • Practical X-ray diffraction methods
Typical X-ray diffraction experiment X-ray tube source X rays 10.000- 40,000 volts Crystalline Lead solid screen Diffraction in three dimensions Incident beam Diffracted X rays Diffraction X-ray detector X-ray as an electromagnetic wave is scattered by electrons around the atoms in the crystal
Typical X-ray diffraction experiment Diffraction X-ray as an electromagnetic wave is scattered by electrons around the atoms in the crystal