期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.083004
关键词
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资金
- U.S. Department of Energy [DE-FG02-04ER15614]
- NSF [PHY-0701372, PHY-0449235, PHY-0649578]
- DOE-BES [DE-FG02-92ER14299, DE-AC02-05CH11231]
- Alexandr von Humboldt Foundation
- The Swedish Research Council
- U.S. Department of Energy, Office of Basic Energy Sciences
- Swedish Foundation for International Cooperation in Research and Higher Education (STINT)
- Direct For Mathematical & Physical Scien
- Division Of Physics [0969322] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-04ER15614, DE-FG02-92ER14299] Funding Source: U.S. Department of Energy (DOE)
The Linac Coherent Light Source free electron laser is a source of high brightness x rays, 2 x 10(11) photons in a similar to 5 fs pulse, that can be focused to produce double core vacancies through rapid sequential ionization. This enables double core vacancy Auger electron spectroscopy, an entirely new way to study femtosecond chemical dynamics with Auger electrons that probe the local valence structure of molecules near a specific atomic core. Using 1.1 keV photons for sequential x-ray ionization of impulsively aligned molecular nitrogen, we observed a rich single-site double core vacancy Auger electron spectrum near 413 eV, in good agreement with ab initio calculations, and we measured the corresponding Auger electron angle dependence in the molecular frame.
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