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Anions and photoelectrons

Investigation of electronic dark states through anion photoelectron spectroscopy

The goal of this project is a direct spectroscopic access to excited electronic states of neutral molecules or neutral molecule complexes, which are only poorly visible in neutral spectroscopy, due to electronic selection rules.

Electronic dark states are

  • Triplet states T1, T2
  • Charge transfer states (inter-and intra-molecular)    
  • * states    
  • symmetry-forbidden states

Direct excitation from the anion often bypasses many transition restrictions existing in neutral optical spectroscopy. Therefore, many of these iso-called "forbidden" states are accessible for the first time.


Construction of apparatus:

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