U.S.-France Cooperative Research: Probing Dynamics in Open Shell Atoms and Molecules using Two Photons Experiments

这项为期三年的美法合作研究奖探索了激光激发的原子和分子系统中少数和多体过程的动力学。西密歇根大学的Norah Berrah和一名学生将每年前往法国，与巴黎南大学实验室的科学家Denis Cubaynes领导的法国团队合作。利用高分辨率光电子能谱和离子管理探测器，研究人员提议对原子金属蒸气和分子进行光激发和光电离实验。他们将使用不同的光子源，包括来自第三代辐射源--劳伦斯伯克利国家实验室的高级光源--的高光谱分辨率单色光子束。智力价值拟议中的项目将增加对VUV光子物质基本相互作用的理解。它将提供对相关系统的基本理解的气相观点，并将为欧洲和美国正在进行的第四代光源(自由电子激光)的未来时间分辨研究奠定基础。例如，可以使用一些拟议的超快光源来研究俄歇过程的时间分辨研究。广泛影响拟议的项目将为研究生提供研究培训，并通过与欧洲领先研究人员的新联系来推进他们的职业生涯。通过与法国团队的合作，学生们将提高他们的实验技能，并在国际合作中获得宝贵的经验。由此产生的研究还将影响其他领域，并可被视为纳米结构和高度相关材料的使能科学。

This three-year award for U.S.-France cooperative research explores the dynamics of few- and many-body processes in laser-excited atomic and molecular systems. Norah Berrah of Western Michigan University and a student will travel to France annually to work with the French team led by Denis Cubaynes, a scientist in Laboratoire d'Interaction du Rayonnement X Avec La Matiere at the University of Paris South. Using high-resolution photoelectron spectroscopy and an ion-managing detector, the investigators propose to carry out photo-excitation and photo-ionization experiments on atomic metal vapors and molecules. They will use different photon sources, including a high spectral-resolution monochromatic photon beam from a third generation radiation source, the Advanced Light Source at Lawrence Berkeley National Laboratory. Intellectual MeritThe proposed project will increase understanding of fundamental VUV photon matter interactions. It will offer a gas-phase perspective on the basic understanding of correlated systems and will set the stage for future time-resolved studies with Fourth Generation Light Source (Free Electron Laser) which are underway in Europe and the U.S. For example, time-resolved studies of Auger processes could be investigated with some of the proposed ultra fast light sources.Broader ImpactsThe proposed project will provide research training to graduate students and advance their careers through new connections to leading European researchers. By working with the French team, students will enhance their experimental skills and gain invaluable experience in international collaboration. The resulting research will also impact other fields and could be considered as an enabling science for nanostructures and highly correlated materials.