K-shell photoionization of atomic anions

原子阴离子的 K 壳层光电离

• 批准号: 389115454
• 负责人: Professor Dr. Stefan Schippers
• 金额: --
• 依托单位: Arbeitsgruppe Atom- und Molekülphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/389115454?language=en
• 关键词: shell; photoionization; atomic; anions

Negative atomic ions play an important role in low-temperature plasmas such as the upper atmosphere or the interstellar medium and also in technical applications. Here, K-shell photodetachment of negatively charged oxygen and sulfur ions will be experimentally investigated using a unique combination of an intense ion beam with tunable synchrotron radiation from one of the world's brightest third generation synchrotron radiation sources, i.e., PETRA III in Hamburg. Absolute cross sections for multiple detachment will be measured as a function of photon energy and, in collaboration with leading theoretical physicists, be interpreted by large-scale atomic-structure calculations. In light of already published first results, it is expected that the proposed work will greatly enlarge the body of data on inner-shell photo-processes (including double K-hole production) involving atomic anions. The results will provide detailed insight into the structure and dynamics of ephemeral multiply excited states in weakly bound small quantum systems. Moreover they will be relevant for other fields of research such as low-temperature plasma physics, physics of planetary atmospheres, and the chemistry in interstellar gas clouds.

负原子离子在高层大气或星际介质等低温等离子体中以及在技术应用中发挥着重要作用。在这里，带负电荷的氧和硫离子的K壳层光剥离将使用强离子束与来自世界上最亮的第三代同步辐射源之一的可调谐同步辐射的独特组合进行实验研究，即，PETRA III在汉堡多重分离的绝对截面将作为光子能量的函数进行测量，并与领先的理论物理学家合作，通过大规模原子结构计算进行解释。根据已经发表的第一批结果，预计拟议的工作将大大扩大涉及原子阴离子的内壳层光过程（包括双K孔生产）的数据。结果将提供详细的洞察结构和动力学的短暂的多重激发态的弱束缚小量子系统。此外，它们将与其他研究领域有关，如低温等离子体物理学，行星大气物理学和星际气体云中的化学。

项目成果

Multiple photodetachment of atomic anions via single and double core-hole creation

通过单核和双核孔产生原子阴离子的多重光脱离

• DOI: 10.1088/1361-6455/aba719
• 发表时间: 2020
• 期刊: Journal of Physics B: Atomic, Molecular and Optical Physics
• 作者: S. Schippers;A. Perry-Sassmannshausen;T. Buhr;M. Martins;S. Fritzsche;A. Müller
• 通讯作者: A. Müller

Multiple Photodetachment of Carbon Anions via Single and Double Core-Hole Creation.

通过单核和双核孔的碳阴离子多重光分离

• DOI: 10.1103/physrevlett.124.083203
• 发表时间: 2020
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: A. Perry-Sassmannshausen;T. Buhr;A. Borovik Jr;M. Martins;S. Reinwardt;S. Ricz;S. O. Stock;F. Trinter;A. Müller;S. Fritzsche;S. Schippers
• 通讯作者: S. Schippers

Atomic Cascade Computations

• DOI: 10.3390/sym13030520
• 发表时间: 2021-03-01
• 期刊: SYMMETRY-BASEL
• 影响因子: 2.7
• 作者: Fritzsche, Stephan;Palmeri, Patrick;Schippers, Stefan
• 通讯作者: Schippers, Stefan