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

0104303塔尼斯该奖项支持约翰塔尼斯和西密歇根大学的学生与德国柏林哈恩迈特纳研究所的尼古拉斯斯托尔特福尔特合作。 研究将集中在三电子系统中离子和光子产生双核空位的研究。 三电子系统的使用使得测量结果能够得到清晰的解释，并且系统的相对简单性有助于理论分析。 原子或离子中的核心空位可以在内层电子通过与光子或带电粒子碰撞而被激发或电离时发生。 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，对这种过程的研究可以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。 德国和美国集团的互补设施和专业知识有望从各个角度获得广泛的新成果。

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.