The distribution of energy and angle of backscattered SEs?

In summary, the distribution of energy and angle of backscattered secondary electrons (SEs) is influenced by factors such as the incident electron energy, surface topography, and composition of the material. Higher incident electron energy results in a larger number of backscattered SEs, while uneven surface topography can cause a non-uniform distribution. The composition of the material also affects the distribution, as different materials have different atomic structures and densities. The distribution of backscattered SEs can be measured using techniques such as SEM or EDS, which provide information about their energy and angle of scattering.
  • #1
Yongchun Feng
1
0
What is the distribution of energy and angle of backscattered electrons from a few MeV heavy ions beam?
Someone telled me the energy obeys landau distribution, but I don't know what's the most probable energy.
 
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  • #2

Thank you for your question about the distribution of energy and angle of backscattered electrons from a few MeV heavy ions beam. I can provide some insights on this topic.

Firstly, it is correct that the energy distribution of backscattered electrons from a few MeV heavy ions beam follows the Landau distribution. This distribution is a type of probability distribution that describes the fluctuations in energy loss of charged particles passing through a material. It is characterized by a peak at the most probable energy, with a long tail towards higher energies.

The most probable energy of backscattered electrons can vary depending on the energy and angle of the incident heavy ions, as well as the properties of the material being bombarded. In general, the most probable energy is usually in the range of a few keV to a few hundred keV. However, it is important to note that this value is not fixed and can vary significantly depending on the specific experimental conditions.

In terms of the angle of backscattered electrons, it is important to consider the scattering angle, which is the angle between the incident heavy ions and the direction of the backscattered electrons. This angle can also vary depending on the experimental setup, but it is generally in the range of a few degrees to a few tens of degrees.

In summary, the distribution of energy and angle of backscattered electrons from a few MeV heavy ions beam follows the Landau distribution, with the most probable energy ranging from a few keV to a few hundred keV and the scattering angle typically in the range of a few degrees to a few tens of degrees. I hope this information helps to answer your question.
 

Related to The distribution of energy and angle of backscattered SEs?

1. What is the distribution of energy and angle of backscattered SEs?

The distribution of energy and angle of backscattered secondary electrons (SEs) refers to the pattern in which these particles are scattered when they hit a surface. This distribution is influenced by various factors such as the incident electron energy, surface topography, and composition of the material.

2. How do the incident electron energy affect the distribution of backscattered SEs?

The higher the energy of the incident electrons, the more backscattered SEs are produced. This is because higher energy electrons can penetrate deeper into the material, resulting in a larger number of collisions and subsequent backscattering of SEs.

3. How does surface topography impact the distribution of backscattered SEs?

Surface topography plays a significant role in the distribution of backscattered SEs. Uneven surfaces, such as those with hills and valleys, can cause the incident electrons to scatter in different directions, resulting in a non-uniform distribution of backscattered SEs.

4. Does the composition of the material affect the distribution of backscattered SEs?

Yes, the composition of the material also plays a role in the distribution of backscattered SEs. Different materials have different atomic structures and densities, which can alter the path of the incident electrons and the subsequent scattering of SEs. This can lead to variations in the distribution of backscattered SEs.

5. How is the distribution of backscattered SEs measured?

The distribution of backscattered SEs can be measured using techniques such as scanning electron microscopy (SEM) or energy-dispersive X-ray spectroscopy (EDS). These techniques allow for the visualization and analysis of the backscattered electrons, providing information about their energy and angle of scattering.

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