AI Article Synopsis
- The study focuses on autoionizing Rydberg states of molecular N₂ using advanced photoelectron spectroscopy techniques to analyze the dynamics.
- A femtosecond extreme ultraviolet pulse excites the molecule, followed by an IR pulse that ionizes it prior to autoionization, allowing observation of different electronic states.
- The measurements reveal a lifetime of approximately 14 fs for one state, while another state has a shorter lifetime, indicating complex interactions in the Rydberg states due to interference stabilization.
Article Abstract
Autoionizing Rydberg states of molecular N_{2} are studied using time-, energy-, and angular-resolved photoelectron spectroscopy. A femtosecond extreme ultraviolet pulse with a photon energy of 17.5 eV excites the resonance and a subsequent IR pulse ionizes the molecule before the autoionization takes place. The angular-resolved photoelectron spectra depend on pump-probe time delay and allow for the distinguishing of two electronic states contributing to the resonance. The lifetime of one of the contributions is determined to be 14±1 fs, while the lifetime of the other appears to be significantly shorter than the time resolution of the experiment. These observations suggest that the Rydberg states in this energy region are influenced by the effect of interference stabilization and merge into a complex resonance.
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| http://dx.doi.org/10.1103/PhysRevLett.116.163003 | DOI Listing |
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