X射线与物质的交互作用 F(滤波片) m 热 swt] 0 透射X射线1-loe-"mP:.A=o U A=0,相干散射 散射X射线 1 >10 反冲电子 不相干散射 电子{ 俄歇电子 光电子 光电效应 俄歌效应 荧光X射线1Ka>A日 X射线在传播途中,与晶体中束缚较紧的电子相遇时, 将发生经典散射
X射线与物质的交互作用 X射线在传播途中,与晶体中束缚较紧的电子相遇时, 将发生经典散射
电子辐射 Dipole radiation sin2 Frame of reference Laboratory frame of reference moving with electrons Lorentz k Kx transformation 0 Kx =Kx Kz Kz=2yk(Relativistic Doppler shift) k'=2元/' Kz 2ykz Synchrotron Radiation Properties and Production.pdf (王宇杰,上海交通大学物理与天文学院)
电子辐射 Synchrotron Radiation Properties and Production.pdf (王宇杰,上海交通大学物理与天文学院)
电子辐射 V<<C water VsC X-rays anode electrons cathode Filament Note:Angle-dependent doppler shift λ='(1-v/ccos0) ='(1-v/ccose) rotating anode water (a) (b) in out 0= 27 B B R sine X-rays X-rays Radius R 8= Radiation The cone half angle pulse electrons e sets the limits of 2△T arc-length from which radiation can be Time cathode observed. Filament
电子辐射
Bragg方程 0,20-Bragg angles Incident wave front 2A=2diki sine-path difference 2△=nλ-constructive interference Reflected wavefront 0 (hkl) dnk! (hkl) 20 Braggs'law:nA=2dhkl sinehkl
Bragg方程