Probing valence electron and hydrogen dynamics using charge-pair imaging with ultrafast electron diffraction
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916811486789632 |
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| author | Wang, Tianyu Jiang, Hui Zhang, Ming Zou, Xiao Zhu, Pengfei He, Feng Li, Zheng Xiang, Dao |
| author_facet | Wang, Tianyu Jiang, Hui Zhang, Ming Zou, Xiao Zhu, Pengfei He, Feng Li, Zheng Xiang, Dao |
| contents | A key challenge in ultrafast science has been to directly track the coupled motions of electrons and nuclei in real-space and real-time. This study presents a significant step towards this goal by demonstrating the feasibility of time-resolved real-space tracking of valence electron and hydrogen dynamics during the photodissociation of ammonia (NH3) using MeV ultrafast electron diffraction. It is demonstrated that the enhanced temporal resolution, in conjunction with the analysis of the charge-pair distribution function, enables the disentanglement of the correlated motion of valence electrons and hydrogens in photoexcited ammonia molecule. The methodology employed in this study, which utilizes the charge-pair distribution function from ultrafast electron scattering to retrieve intertwined electron and nucleus dynamics, may open up new opportunities in the study of quantum dynamics for a wide range of molecules. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_21047 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing valence electron and hydrogen dynamics using charge-pair imaging with ultrafast electron diffraction Wang, Tianyu Jiang, Hui Zhang, Ming Zou, Xiao Zhu, Pengfei He, Feng Li, Zheng Xiang, Dao Chemical Physics Atomic and Molecular Clusters Atomic Physics Optics A key challenge in ultrafast science has been to directly track the coupled motions of electrons and nuclei in real-space and real-time. This study presents a significant step towards this goal by demonstrating the feasibility of time-resolved real-space tracking of valence electron and hydrogen dynamics during the photodissociation of ammonia (NH3) using MeV ultrafast electron diffraction. It is demonstrated that the enhanced temporal resolution, in conjunction with the analysis of the charge-pair distribution function, enables the disentanglement of the correlated motion of valence electrons and hydrogens in photoexcited ammonia molecule. The methodology employed in this study, which utilizes the charge-pair distribution function from ultrafast electron scattering to retrieve intertwined electron and nucleus dynamics, may open up new opportunities in the study of quantum dynamics for a wide range of molecules. |
| title | Probing valence electron and hydrogen dynamics using charge-pair imaging with ultrafast electron diffraction |
| topic | Chemical Physics Atomic and Molecular Clusters Atomic Physics Optics |
| url | https://arxiv.org/abs/2506.21047 |