Page 563 - Radiation Safety

X-ray Analyzers

▪ X-rays will be diffracted/reflected by the materials/crystals only if they satisfy the

following relationship:

sin  = n sin  - angle of incident to the target material

2d d - inter-atom spacing of the lattice

 - x-rays wavelength and

n - an integer

▪ The scattered X-rays are then measured to indicate the lattice pattern of the material

and this form the basic principle of X-rays diffraction (XRD).

▪ A crystal lattice is a three dimensional of atoms in space. The crystal structure could be

either cubic, rhombic, etc.