Attosecond Electron Dynamics

阿秒电子动力学

• 批准号: 1049946
• 负责人: Stephen Leone
• 金额: $ 49.5万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-01 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1049946&HistoricalAwards=false
• 关键词: Attosecond; Electron; Dynamics

In this project funded by the Chemical Structure, Dynamics and Mechanisms program of the Chemistry Division, Professor Stephen Leone of the University of California at Berkeley will employ laser-produced soft x-ray attosecond pulses to measure attosecond chemical dynamics in atoms and small molecules. In a pump-probe configuration, one short pulse in the visible or ultraviolet will ionize or electronically excite an atom or molecule, and a second attosecond x-ray pulse will probe electronic state dynamics by transient absorption of the core level transitions accessible in specific atoms. Electronic timescales for wave-like propagation will be measured. The project will investigate high field ionization and non-Born-Oppenheimer effects. Broader impacts involve the education of students in the principles of x-ray detection for molecular dynamics, optics, and cutting-edge laser principles such as carrier-envelope phase stabilization.

在这个由化学系化学结构、动力学和机制项目资助的项目中，加州大学伯克利分校的Stephen Leone教授将利用激光产生的软X射线阿秒脉冲来测量原子和小分子中的阿秒化学动力学。 在泵浦-探测配置中，可见光或紫外光中的一个短脉冲将激发或电子激发原子或分子，并且第二个阿秒X射线脉冲将通过在特定原子中可访问的芯能级跃迁的瞬态吸收来探测电子状态动力学。 将测量波状传播的电子时标。 该项目将研究高场电离和非玻恩-奥本海默效应。 更广泛的影响包括对学生进行分子动力学、光学和尖端激光原理（如载波包络相位稳定）的x射线检测原理的教育。