Angle-resolved resonant Auger-electron spectroscopy has been carried out on the nitrogen molecule at selected photon energies around 419 eV, where a [Formula Presented] core electron and two valence electrons are promoted into the lowest unoccupied molecular orbital [Formula Presented] Significant enhancement of a specific band, which cannot be disentangled in direct photoionization, is observed at a binding energy of 37.6 eV, with a value of the anisotropy parameter [Formula Presented] much smaller than 2. We assign this new band to the transition to a doubly excited cationic state of [Formula Presented] in which two of the excited valence electrons remain in the [Formula Presented] orbital, proposing a “double spectator” type decay mechanism. This observation shows how to preferentially probe multiply excited configurations of cations using multiple resonant excitation.
|Number of pages||1|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 2003|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics