期刊
PHYSICAL REVIEW LETTERS
卷 104, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.213001
关键词
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资金
- European Framework Programme [FP7/2007-2013, 226716]
- Science Foundation Ireland
- IRCSET
- France-Ireland ULYSSES
- Finnish Academy
- European COST Action [CM0702]
- Marie Curie RTN EMALI
Two-photon excitation of a single-photon forbidden Auger resonance has been observed and investigated using the intense extreme ultraviolet radiation from the free electron laser in Hamburg. At the wavelength 26.9 nm (46 eV) two photons promoted a 3d core electron to the outer 4d shell. The subsequent Auger decay, as well as several nonlinear above threshold ionization processes, were studied by electron spectroscopy. The experimental data are in excellent agreement with theoretical predictions and analysis of the underlying multiphoton processes.
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