Photo-induced processes of endohedral fullerene ions: Experiment

内嵌富勒烯离子的光诱导过程：实验

• 批准号: 245652604
• 负责人: Professor Dr. Alfred Müller
• 金额: --
• 依托单位: Institut für Atom- und Molekülphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/245652604?language=en
• 关键词: Photo; induced; processes; endohedral; fullerene

The response of atoms A encapsulated within spheres of carbon atoms to single-photon absorption will be studied. Pure (with respect to mass and charge) beams of endohedral fullerene ions in different charge states will be exposed to synchrotron radiation with energies 17 to 340 eV at the Advanced Light Source (ALS) in Berkeley and with energies of 250 to 3000 eV at PETRA III in Hamburg. Within this wide energy range, different subshells of the encapsulated atom can be excited or ionized. Photoelectron production and subsequent decay of the atom result in illumination of the fullerene sphere from within by electrons or photons of greatly different but always well quantified energies. The emission of electrons and photons from the central atom is influenced by the surrounding sphere which gives rise to a large variety of phenomena of ionization and fragmentation of the whole endohedral fullerene complex with additional modifications of the cross sections by interference effects. Quantitative experimental studies of these phenomena are badly needed for testing and guiding the world-wide theoretical efforts to correctly model the behavior of endohedral fullerenes exposed to electromagnetic radiation. Variation of the initial ion charge state will provide new insights into the electro-chemistry of encapsulated atoms. By using very heavy encapsulated atoms it is planned to demonstrate the effect of heavy x-ray absorbers on surrounding material which is of interest for efficiently damaging cancer cells by electromagnetic radiation. The experimental effort will be coordinated with the theoretical work carried out at the Frankfurt Institute for Advanced Studies.

我们将研究包裹在碳原子球体中的原子A对单光子吸收的响应。在伯克利的高级光源(ALS)上，处于不同电荷状态的面内富勒烯离子的纯束(相对于质量和电荷)将被暴露在能量为17到340 eV的同步辐射中，在汉堡的Petra III上，能量为250到3000 eV。在这个宽的能量范围内，被包裹的原子的不同的亚壳层可以被激发或电离。光电子的产生和随后原子的衰变导致富勒烯球体从内部被能量大不同但总是被很好量化的能量的电子或光子照射。中心原子的电子和光子发射受到周围球体的影响，这导致了整个富勒烯络合物的各种电离和碎裂现象，并通过干涉效应对截面进行了额外的修改。这些现象的定量实验研究是迫切需要的，以测试和指导世界范围内的理论努力，以正确地模拟面内富勒烯在电磁辐射下的行为。初始离子电荷态的变化将为研究被包裹原子的电化学提供新的见解。通过使用非常重的被包裹的原子，计划展示重x射线吸收器对周围材料的影响，这对于通过电磁辐射有效地破坏癌细胞是有兴趣的。实验工作将与法兰克福高级研究所开展的理论工作相协调。

项目成果

Photoionisation of ions with synchrotron radiation: from ions in space to atoms in cages

• DOI: 10.1080/00107514.2015.1109771
• 发表时间: 2016-04
• 期刊: Contemporary Physics
• 影响因子: 2
• 作者: S. Schippers;A. Kilcoyne;R. Phaneuf;A. Müller

Photoionization and photofragmentation of the C60+ molecular ion

C60 分子离子的光电离和光碎裂

• DOI: 10.1103/physreva.93.033401
• 发表时间: 2016
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: K. K. Baral;N. B. Aryal;D. A. Esteves-Macaluso;C. M. Thomas;J. Hellhund;R. Lomsadze;A. L. D. Kilcoyne;A. Müller;S. Schippers;R. A. Phaneuf
• 通讯作者: R. A. Phaneuf

Cross sections for photoionization of fullerene molecular ions Cn+ with n = 40, 50, 70, 76, 78, and 84

n = 40、50、70、76、78 和 84 的富勒烯分子离子 Cn 光电离的横截面

• DOI: 10.1103/physreva.95.053412
• 发表时间: 2017
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: C. M. Thomas;K. K. Baral;N. B. Aryal;M. Habibi;D. A. Esteves-Macaluso;A. L. D. Kilcoyne;A. Aguilar;A. S. Schlachter;S. Schippers;A. Müller;R. A. Phaneuf
• 通讯作者: R. A. Phaneuf