劉小井

研究原子、分子和團簇在同步輻射👨🏻、飛秒激光、自由電子激光下的激發👨‍❤️‍👨、電離、Auger電子發射和解離等過程。原子分子是化學反應中的最小單元，原子🫓、分子和團簇是研究量子多體問題的理想體系🖼。原則上所有的微觀反應過程都可以統一用電子和原子核在不同時空尺度上的運動來表述，但是處於激發態的多尺度量子多體問題求解一直難於得到解決👩🏿‍🎤。同步輻射提供能量從幾十到幾千電子伏的高度單色化的光子，可以精確選擇激發態；飛秒激光下時間依賴的強激光場提供了研究動態過程和操控反應過程的手段💆‍♀️，而自由電子激光結合了同步輻射和飛秒激光的優點。我們的目標是直接觀察微觀體系在反應中的電子和原子的實時運動。

01. Liu, X.J., et al., Disentangling Auger decays in O₂ by photoelectron-ion coincidences. Scientific Reports, 2017. 7. 2898

02. Liu, X.J., C. Nicolas, and C. Miron, In situ correction of the spherical aberration in a double-toroidal electron analyzer. Review of Scientific Instruments, 2017. 88. 023110

03. Nagaya, K., et al., Femtosecond charge and molecular dynamics of I-containing organic molecules induced by intense X-ray free-electron laser pulses. Faraday Discussions, 2016. 194: p. 537-562.

04. Liu, X.J., et al., Einstein-Bohr recoiling double-slit gedanken experiment performed at the molecular level. Nature Photonics, 2015. 9: p. 120-125.

05. Liu, X.J., C. Nicolas, and C. Miron, Design of a lens table for a double toroidal electron spectrometer. Review of Scientific Instruments, 2013. 84. 033105

06. Fukuzawa, H., et al., Deep Inner-Shell Multiphoton Ionization by Intense X-Ray Free-Electron Laser Pulses. Physical Review Letters, 2013. 110. 173005

07. Lucchese, R.R., et al., Asymmetry in the molecular-frame photoelectron angular distribution for oxygen 1s photoemission from CO2. Journal of Physics B-Atomic Molecular and Optical Physics, 2012. 45. 194014

08. Ouchi, T., et al., Three-Electron Interatomic Coulombic Decay from the Inner-Valence Double-Vacancy States in NeAr. Physical Review Letters, 2011. 107. 053401

09. Liu, X.J., et al., Breakdown of the two-step model in K-shell photoemission and subsequent decay probed by the molecular-frame photoelectron angular distributions of CO2. Physical Review Letters, 2008. 101. 083001