Excitation to optically forbidden state

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SUMMARY

This discussion centers on the mechanisms by which electron impact can induce optically forbidden transitions in atoms and molecules. Participants emphasize the importance of understanding the rules governing electric-dipole allowed and forbidden transitions. The conversation highlights the need for clarity on the fundamental principles of quantum mechanics that dictate these transitions. Key insights include the role of electron interactions in facilitating transitions that are otherwise not permitted under standard optical conditions.

PREREQUISITES
  • Quantum mechanics principles, particularly regarding electron transitions.
  • Understanding of electric-dipole selection rules.
  • Familiarity with atomic and molecular spectroscopy.
  • Knowledge of electron impact phenomena in physical chemistry.
NEXT STEPS
  • Research the derivation of electric-dipole selection rules in quantum mechanics.
  • Study the effects of electron impact on atomic and molecular states.
  • Explore the concept of optically forbidden transitions in detail.
  • Investigate experimental methods for observing forbidden transitions in spectroscopy.
USEFUL FOR

Physicists, chemists, and researchers in spectroscopy or quantum mechanics who seek to deepen their understanding of electron interactions and their effects on atomic and molecular transitions.

vrinda mukund
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Can somebody please explain how electron impact can cause optically forbidden transitions in atoms and molecules ?
 
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I'm not sure how to answer you, as I don't understand what you find surprising here.

Do you understand how the rules for electric-dipole allowed and forbidden transitions are obtained?
 

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