What are the angles of photoelectron emissions from a metal surface?

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SUMMARY

Photoelectron emissions from a metal surface exhibit a spread in angle, contrary to the assumption that they only emit normal to the surface. In standard photoelectric effect experiments, a potential is applied to collect all photoelectrons, making the angular spread irrelevant. However, in angle-resolved photoemission spectroscopy (ARPES) experiments, this angular distribution is a critical measurement. Understanding these principles is essential for interpreting results in quantum mechanics and material science.

PREREQUISITES
  • Basic understanding of the photoelectric effect
  • Familiarity with quantum mechanics principles
  • Knowledge of angle-resolved photoemission spectroscopy (ARPES)
  • Experience with electron emission phenomena
NEXT STEPS
  • Research the principles of the photoelectric effect in detail
  • Study the methodology and applications of angle-resolved photoemission spectroscopy (ARPES)
  • Explore quantum mechanics concepts related to electron behavior and emission
  • Investigate the impact of potential application in photoelectron collection
USEFUL FOR

Physicists, material scientists, and researchers interested in quantum mechanics and electron emission phenomena will benefit from this discussion.

i_island0
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hey.. can some one tell me... when photo electrons come out of the metal surface... then are those emissions normal to the surface or they come out at any angle from the surface.
 
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Wouldn't they come out at any angle? I'm not suggesting I'm correct by the way but from what I know of electrons and quantum mechanics, the emission of photons (or indeed electrons) would be a matter of statistical probability and thus position of emission and direction would not be known. Just a guess, but I can't see how they'd be emitted at precisely the same angle? Probably completely wrong but there you go. If nothing else I'll learn why I am wrong. :smile:
 
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i_island0 said:
hey.. can some one tell me... when photo electrons come out of the metal surface... then are those emissions normal to the surface or they come out at any angle from the surface.

There is a spread in the angle.

However, in the standard photoelectric effect, you apply a potential to collect all of the photoelectrons, so this spread isn't a factor. In an angle-resolved photoemission spectroscopy experiment, though, this angular spread is one of the things that is being measured.

Zz.
 
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