Monochromatization(单色化) ·Filter(residual K Kai Monochromator 营 (单色器) suauI Linear absorption,u KB KB Wavelength,入 Wavelength,入 Source Focusing Circle 晶体 To select a defined wavelength. Eliminates fluorescence
Monochromatization (单色化 ) • Filter (residual K) • Monochromator (单色器 ) • To select a defined wavelength. • Eliminates fluorescence
kalka2 Why the splitting is larger for higher theta? 195 d-t5 kaj only
k1/k2 k1 only Why the splitting is larger for higher theta?
System aberrations Peak position and peak width are affected. Axial divergence error ·Flat specimen error Goniometer circle Focusing circle RS D RS RS DS 20 20
System aberrations • Peak position and peak width are affected. • Axial divergence error • Flat specimen error
The ideal sample ·Randomly orientated Ideal reciprocal lattice point Size and shape -Strain
The ideal sample • Randomly orientated • Ideal reciprocal lattice point – Size and shape – Strain
How to prepare a good sample ·Powder(priority) ·Bulk sample 1010 D2h 109 N=1.1108 d3 10e Quantitative analysis 6 106 Qualitative analysis 105 10 0 20 40 60 80 100 Particle diameter,d(um)
How to prepare a good sample • Powder (priority) • Bulk sample Qualitative analysis Quantitative analysis