Spectroscopy - Forbidden transitions appearing in spectrum

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SUMMARY

Forbidden transitions in spectroscopy can appear in experimental spectra due to several factors, including transitions from higher energy levels that coincide with the energy of forbidden transitions. The term "forbidden" does not imply that these transitions are impossible; rather, they are highly suppressed and may occur under specific conditions. The resolution of the spectroscopic technique plays a crucial role in determining the visibility of these transitions, as random coincidences are less likely at higher resolutions.

PREREQUISITES
  • Understanding of quantum mechanics principles related to atomic transitions
  • Familiarity with spectroscopic techniques and their resolution capabilities
  • Knowledge of energy level diagrams and their significance in spectroscopy
  • Basic comprehension of the concept of "forbidden transitions" in quantum mechanics
NEXT STEPS
  • Research the principles of quantum mechanics related to atomic transitions
  • Explore different spectroscopic techniques and their resolution limits
  • Study energy level diagrams and their application in spectroscopy
  • Investigate the conditions under which forbidden transitions can occur in various materials
USEFUL FOR

Students and researchers in the fields of chemistry and physics, particularly those studying spectroscopy and atomic transitions.

Jalo
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Homework Statement



Why do supposedly forbidden transitions appear in experimental spectrums?

Homework Equations

The Attempt at a Solution



I'm really puzzled as to why they appear. Can it be due to transitions on higher energy levels that happen to be equal to the forbidden ones?
 
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"Forbidden" rarely means completely impossible in spectroscopy. It is just highly suppressed.
What does "suddenly" mean here?

Random coincidences with unrelated transitions are possible, but unlikely if the resolution is good enough.
 

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