期刊
SCIENCE
卷 358, 期 6365, 页码 893-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao7043
关键词
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资金
- European Research Council (Advanced Grant PALP) [339253]
- Swedish Research Council [20138185, 2014-3724, 2016-03789]
- Knut and Alice Wallenberg Foundation
- European Research Council (ERC) [339253] Funding Source: European Research Council (ERC)
- Swedish Research Council [2016-03789] Funding Source: Swedish Research Council
Ultrafast processes in matter, such as the electron emission after light absorption, can now be studied using ultrashort light pulses of attosecond duration (10-18 seconds) in the extreme ultraviolet spectral range. The lack of spectral resolution due to the use of short light pulses has raised issues in the interpretation of the experimental results and the comparison with theoretical calculations. We determine photoionization time delays in neon atoms over a 40-electron volt energy range with an interferometric technique combining high temporal and spectral resolution. We spectrally disentangle direct ionization from ionization with shake-up, in which a second electron is left in an excited state, and obtain excellent agreement with theoretical calculations, thereby solving a puzzle raised by 7-year-old measurements.
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