U.S.-Germany Cooperative Research: Core Excitation of Atomic and Solid Li by Photons and Ions

该奖项支持西密歇根大学的John Tanis和学生与德国柏林Hahn Meitner研究所的Nikolaus Stolterfoht合作。本研究将重点研究三电子系统中离子和光子产生的双核空位。使用三电子系统可以清楚地解释测量结果，并且系统的相对简单性使其适合于理论分析。当原子或离子的内壳电子通过与光子或带电粒子的碰撞而被激发或电离时，原子或离子的核心空位就会发生。如果在一次碰撞中产生两个这样的空位，则产生双核空位的机制可能涉及电子相关效应。因此，对这些过程的研究使我们深入了解具有多重相互作用粒子的系统的原子结构和碰撞动力学。德国和美国团队的互补设施和专业知识承诺从各个角度获得广泛的新结果。

0104303TanisThis award supports John Tanis and students of Western Michigan University to cooperate with Nikolaus Stolterfoht of the Hahn Meitner Institute in Berlin, Germany. The research will focus on the investigation of double-core vacancy production by ions and photons in three-electron systems. The use of three-electron systems enables a clear interpretation of the results of measurements, and the relative simplicity of the systems lends itself to theoretical analysis. A core vacancy in an atom or ion can occur when an inner-shell electron is excited or ionized through collision with a photon or a charged particle. If two such vacancies are produced in a single collision, the mechanisms for the production of the double-core vacancies can involve electron correlation effects. As a result, the study of such processes gives insight into the atomic structure and collisional dynamics of systems with multiply interacting particles. Complementary facilities and expertise in the German and U.S. groups promise a wide range of new results from various perspectives.