通过深亚埃库仑爆炸成像可视化基态C₃H₄的三维量子涨落
Visualizing Three-Dimensional Quantum Fluctuations of Ground-State C$_3$H$_4$ via Deep Sub-Angstrom Coulomb Explosion Imaging
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- Institute of Modern Physics, Chinese Academy of Sciences（中国科学院近代物理研究所）
- University of Chinese Academy of Sciences（中国科学院大学）
- Yangzhou University（扬州大学）
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中文总结 AI 辅助
本研究以丙二烯和丙炔为原型，利用41.9 keV/u Xe²⁰⁺束实现0.1 Å超高分辨率的库仑爆炸成像，可视化碳碳键长变化及丙二烯中CH₂基团耦合运动，为观测基态分子三维量子涨落奠定基础。
中文摘要 AI 辅助
库仑爆炸成像（CEI）是确定孤立气相分子静态几何结构的有力工具。本研究以丙二烯和丙炔为原型，展示了高电荷离子诱导的CEI可实现亚埃分辨率。使用41.9 keV/u的Xe²⁰⁺束，清晰可视化了碳碳单键、双键和三键长度的微小变化，表明达到了0.1 Å的超高分辨率。这一前所未有的分辨率不仅能区分不同键级的碳碳键，还为直接观测基态分子三维结构固有的量子涨落奠定了坚实基础。值得注意的是，本测量明确可视化了丙二烯中被中心碳隔开的两个CH₂基团的耦合集体运动。
英文摘要
Coulomb explosion imaging (CEI) is a powerful tool for determining static geometries of isolated gas-phase molecules. In this work, taking allene and propyne as prototype, we demonstrate sub-angstrom resolution achieved with highly charged ion-induced CEI. Using 41.9 keV/u Xe$^{20+}$ beam, minute variations of CC single, double and triple bond lengths are clearly visualized, indicating that an ultrahigh resolution of 0.1 $\mathring{\mathrm{A}}$ is achieved. This unprecedented resolution not only makes it possible to distinguish CC bonds with different bond orders, but also lays a solid foundation for direct observation of quantum fluctuations inherent to 3D structure of a ground-state molecule. Notably, the coupled collective motion of the two CH$_2$ moieties spaced by a central carbon within allene is unambiguously visualized in our measurements.
