- Conference date: 25-28 July 2001
- Location: Rolla, Missouri (USA)
In atoms and molecules alike, electron-electron coincidence spectroscopies (e-e) have been extensively applied to study single particle as well as correlated properties of the target. Recent years have witnessed the first successful (e-e) on solids and surfaces. The experimental effort undertaken in order to apply (e-e) to solids is twofold. On one hand the realization of photon induced resonant double photoionization, i.e. core ionization followed by autionization (Auger) process in which Auger and photoelectron are detected in coincidence (APECS). On the other hand the realization of direct single electron ionization of valence states where both final electrons are detected in coincidence and discriminated in energy and momentum. In the first case, value and limitations of the so called two step mechanism for core ionization/relaxation processes is under scrutiny. In the second case, the possibility of direct measurement of binding energy and momentum distribution is under test. Although many aspects of these experiments are common to gas phase and condensed matter, some noticeable differences do exist; most of them amounting to final state interaction with the periodic potential that sustains the electronic states of the solid target.
- Atomic electronic properties
- Electron spectroscopy
- Molecular electronic properties
- Molecular spectroscopy
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