NSF East Asia and Pacific Summer Institute (EAPSI) for FY 2013 in China

该行动资助乔治亚大学的Renata Cumbee于2013年夏天在中国科学院北京大学材料科学与光电技术学院开展数学和物理科学领域的研究项目。这个项目的题目是“高电荷离子与原子的碰撞：在太阳系x射线发射中的应用”。为了提高当前天体物理学中x射线模型的质量，本项目使用瞿教授小组提供的明确的量子力学截面计算，用于重要太阳风离子的电荷交换碰撞过程和与日球层中性原子碰撞的速度，从而实现利用当前x射线观测所需的详细光谱建模。本项目对重要太阳风离子Ne9+和Mg11+与中性h碰撞的重要碰撞系统进行了计算，计算的相关碰撞能量为10 eV/u ~ 50 keV/u，包括所有重要n、1、s分辨态的状态选择截面。特别是，这项工作着重于在量子解析的n， l， S态中产生的非平衡分布。这个项目将直接影响我们对原子碰撞和太阳风与日球层相互作用的理解。EAPSI奖学金的广泛影响包括为研究员提供美国以外的第一手研究经验；介绍该地区的科学、科学政策和科学基础设施；以及对社会、文化和语言的了解。这些活动符合美国国家科学基金会的目标，即在其科学家、工程师和教育工作者的职业生涯早期培养国际合作，从而确保美国科学劳动力具有全球意识。此外，当EAPSI奖学金完成后，研究员将有机会在她的研究领域培训其他研究生，并通过研讨会，她将能够在未来几年招募学生申请该奖学金。

This action funds Renata Cumbee of the University of Georgia to conduct a research project in the Mathematical and Physical Sciences area during the summer of 2013 at the College of Material Sciences and Optoelectronic Technology at the University of the Chinese Academy of Sciences in Beijing, China. The project title is "Highly-Charged Ion Collisions with Atoms: Applications to X-ray Emission in the Solar System." The host scientist is Prof. Yizhi Qu.To improve the quality of current x-ray models in astrophysics, this project uses explicit quantum-mechanical cross section calculations produced by Prof. Qu's group for the collisional process of charge exchange for important solar wind ions and velocities colliding with heliospheric neutral atoms which enables detailed spectral modeling needed to exploit current X-ray observations. The project performs the calculations for the important collision systems of important solar wind ions Ne9+ and Mg11+ colliding with neutral H. The calculations are performed over the relevant collision energies, 10 eV/u to 50 keV/u, and include state selective cross sections to all important n, l, S-resolved states. In particular, this work focuses on the resulting nonequilibrium distributions created in the quantum-resolved n, l, S states. This project will have a direct impact on advancing our understanding of atomic collisions and the solar wind interaction with the heliosphere.Broader impacts of an EAPSI fellowship include providing the Fellow a first-hand research experience outside the U.S.; an introduction to the science, science policy, and scientific infrastructure of the respective location; and an orientation to the society, culture and language. These activities meet the NSF goal to educate for international collaborations early in the career of its scientists, engineers, and educators, thus ensuring a globally aware U.S. scientific workforce. Furthermore, when the EAPSI fellowship is complete, the Fellow will have the opportunity to train other graduate students in her field of research and through seminars, she will be able to recruit students to apply to this fellowship in future years.