Diffraction orders of grazing incidence

In summary, the problem involves a honeycomb lattice and an incident wave of 400 nm with a wavevector at an angle of 75 degrees to the surface's normal. It is similar to LEEDS and the condition for diffraction to occur is when |G_2d|<=2*|k_s|. The lattice surface structural constant should also be taken into account.
  • #1
Hamedo
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Homework Statement


We have a honeycomb lattice. There is an incident wave of 400 nm, whose wavevector has an angle of 75 degree with the surface's normal. This problem is similar to LEEDS ( low energy electron diffraction).

Homework Equations


What is the condition of diffraction i.e. which orders achieve Von-Laue conditions ?

The Attempt at a Solution


I tried to put that |G_2d|<=2*|k_s|, where G is the 2-dimension reciprocal lattice vector, and k is the length of the scattering wavevector ( |K_incidence|=|K_scattering|).
 
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  • #2
hmm that's interesting, did you take into account the lattice surface structural constant into account?
 

FAQ: Diffraction orders of grazing incidence

1. What is diffraction in the context of grazing incidence?

Diffraction in grazing incidence refers to the phenomenon where a beam of light passing through a small aperture or slit at a low angle (less than the critical angle) is diffracted into multiple orders, or beams, due to the interaction with the edges of the aperture. This is commonly observed in X-ray diffraction experiments.

2. How are diffraction orders determined in grazing incidence?

The diffraction orders in grazing incidence are determined by the angle of incidence, the spacing of the apertures, and the wavelength of the incident light. Generally, the higher the angle of incidence, the more diffraction orders are observed. The spacing of the apertures also affects the intensity and distribution of the diffraction orders.

3. What is the significance of diffraction orders in grazing incidence?

The diffraction orders in grazing incidence provide information about the structure and properties of the material being studied. By analyzing the intensity and distribution of the diffraction orders, scientists can determine the crystal structure, lattice spacing, and other important parameters of a material.

4. How does the material being studied affect the diffraction orders in grazing incidence?

The diffraction orders in grazing incidence are highly dependent on the properties of the material being studied. Different materials have different crystal structures, lattice spacings, and surface roughness, which can affect the intensity and distribution of the diffraction orders. Therefore, it is important to carefully select the material and prepare it for the experiment to obtain accurate results.

5. What are some applications of studying diffraction orders in grazing incidence?

Studying diffraction orders in grazing incidence has a wide range of applications in various fields such as materials science, chemistry, geology, and biology. It is commonly used to determine the crystal structure and properties of materials, analyze surface roughness, and investigate molecular structures. It is also used in X-ray diffraction techniques for protein crystallography and in the development of new materials with specific properties.

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