Electron- and Photon-Induced Dynamics

现代实验技术，如COLTRIMS(冷靶反冲离子动量谱)，有时被称为“反应显微镜”，可以对反应动力学进行详细测量。现在可以同时记录所有带电分子碎片的光电子角分布和动量。这些研究是对光子和电子与分子相互作用的动力学以及随后系统振动模式之间的能量流动的极好的探索。这些测量对理论预测提出了新的挑战，但也提供了理解这些过程的机会。这项研究计划将研究分子和分子离子的电子散射以及碰撞后的动力学。计算得到了准确可靠的截面和共振参数，并能详细地描述电子碰撞后的核动力学。将研究的系统包括对了解星际云中分子的形成至关重要的解离复合的研究，对燃烧火焰等低温等离子体很重要的解离激发的研究，以及从空间分子预测角分布的多原子系统的光电离研究。所有这些都有助于更好地理解这些反应，最终目标是控制动态。这项研究将加强研究和教育的基础设施。它将在加州大学戴维斯分校的应用科学系进行，这是一个多学科的研究生项目，拥有来自广泛领域的教职员工和学生。PI与劳伦斯·伯克利实验室有很强的合作。此外，她还与国际合作伙伴保持着密切的合作，特别是在瑞典CRYRING的实验工作、在德国的TSR以及与法国阿弗尔大学的理论工作者。这两个机构的学生都曾长期访问过，与国际和平协会合作。这些合作正在进行中。此外，它还将扩大任职人数不足群体的参与。作为她所在学院(和系)中为数不多的女教职员工之一，PI充当着新生的导师，特别是进入该项目的女性。妇女，特别是活跃在研究中的妇女，构成了目前物理学中代表性不足的群体之一。PI一直是并将继续成为学生的榜样。她曾担任过几位女学生的论文导师。PI参与了一些课程，目的是接触校园里的非理科专业学生，让他们了解什么是科学。在过去的三年里，她在一个新生研讨会上授课，“如何制作镜头”，理科和非理科学生各占一半。在08年春季，她教授了一个额外的新生专题讨论会--《事物是如何运作的》。大多数学生都是非理科专业的。这些研讨会非常成功。尤其是《事情是如何运作的》很受学生们的欢迎。今年，国际学生联合会开设了一个名为《基于研讨会》的通识教育课，受到了学生们的好评。这些学生大多是大一和大二的非理科专业学生。

Modern experimental techniques such as COLTRIMS (cold target recoil ion momentum spectroscopy) sometimes referred to as a 'reaction microscope', allow detailed measurements of the dynamics of the reaction. It is now possible to record in coincidence, both photoelectron angular distributions and the momenta of all charged molecular fragments. These studies are an excellent probe of the dynamics in the interaction of photons and electrons with molecules and the subsequent flow of energy between the vibrational modes of the system. These measurements pose a new challenge to theoretical predictions, but also an opportunity to understand these processes. This research program will study electron scattering from molecules and molecular ions and the subsequent dynamics following the collision. The calculations produce accurate and reliable cross sections, resonance parameters, and can describe in detail the nuclear dynamics following the electron collision. The systems that will be studied range from studies of dissociative recombination, which are critical in understanding the formation of molecules in interstellar clouds, dissociative excitation, which is important in low-temperature plasmas, such as combustion flames and the study of photoionization of polyatomic systems - predicting angular distributions from fxed-in-space molecules. All of this leads to a better understanding of these reactions, with an ultimiate goal of controlling the dynamics. This research will enhance infrastructure for research and education. It will be carried out at the Department of Applied Science, University of California, Davis, a multi disciplinary graduate program that houses faculty and students from a wide range of areas. The PI has strong collaborations with Lawrence Berkeley Lab. In addition, she maintains a strong collaboration with international partners, in particular the experimental effort at the CRYRING in Sweden, the TSR in Germany and with theoreticians at the Universite de Havre, France. Students from both these institutions have made long-term visits to work with the PI. These collaborations are on-going. In addition it will broaden participation of underrepresented groups. As one of the few faculty women in her college (and department), the PI acts as a mentor to new students, particularly women who are entering the program. Women, particularly women who are active in research, constitute one of the presently under represented groups in physics. The PI has and continues to serve as a role model for students. She has been the thesis adviser for several women students. The PI has been involved in classes whose purpose is to reach out to non-science majors on campus and give them some idea of what science is. For the past three years she has taught a Freshman seminar, "How to make a lens" which had a 50/50 enrollment of science vs non-science majors. In Spring 08, she taught an additional Freshman seminar, "How things work". The majority of the students were non-science majors. These seminars were very successful. In particular, the "How things work" was very popular with the students. This year, the PI taught a general education class entitled based on the seminar that was very well-received by the students. These students were mostly freshman and sophomore non-science majors.