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5 votes
1 answer
1k views

Why is the mean free path length of an electron in a solid described by a "universal curve"? (doesn't include electron density)

I've been experimenting with XPS (X-ray photoelectron spectroscopy) and learned that the depth from which the observed electrons originated depends on their mean free path length, which makes sense to ...
Wihtedeka's user avatar
  • 2,068
1 vote
1 answer
3k views

Mean free path of electron in air?

I'm interested in approximating the mean free path of an electron in air. I think I'm going to need to add something more into my approximation because currently I calculate $400m$ for the mean free ...
Tomi's user avatar
  • 713
1 vote
1 answer
695 views

The mean free path of electrons in high vacuum is 26 billion kilometres?

I used this formula to calculate the mean free path length of an electron in high vacuum. $$\lambda = \frac{k T}{\sqrt{2}\cdot4\pi r^2 \cdot p}$$ where k is the Boltzmann konstant, T the temperature ...
Caito's user avatar
  • 113
0 votes
1 answer
102 views

How to interpret 'electron energy above fermi level (eV)'?

In some mean free path graphs, I see 'electron energy above Fermi level (eV)' on the x-axis See figure: What does it mean? Is it electrons kinetic energy in the material? What happens if the graph ...
Kutadgubilig's user avatar