XUV fluorescence as a probe of interatomic Coulombic decay of resonantly excited He nanodroplets
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| Autores principales: | , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2025
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| _version_ | 1866912583360970752 |
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| author | Sishodia, Keshav Ltaief, Ltaief Ben Scheel, Niklas Földes, István B. Roos, Andreas Hult Albrecht, Martin Staněk, Matyáš Jurkovičová, Lucie Hort, Ondrej Nejdl, Jaroslav García-Alfonso, Ernesto Halberstadt, Nadine Andreasson, Jakob Klimešová, Eva Krikunova, Maria Krishnan, Sivarama Heidenreich, Andreas Mudrich, Marcel |
| author_facet | Sishodia, Keshav Ltaief, Ltaief Ben Scheel, Niklas Földes, István B. Roos, Andreas Hult Albrecht, Martin Staněk, Matyáš Jurkovičová, Lucie Hort, Ondrej Nejdl, Jaroslav García-Alfonso, Ernesto Halberstadt, Nadine Andreasson, Jakob Klimešová, Eva Krikunova, Maria Krishnan, Sivarama Heidenreich, Andreas Mudrich, Marcel |
| contents | Superfluid He nanodroplets resonantly excited by extreme ultraviolet (XUV) pulses exhibit complex relaxation dynamics, including the formation of metastable excited He$^*$ atoms trapped in bubbles, the desorption of excited atoms from the droplet surface, and autoionization via interatomic Coulombic decay (ICD). Irradiation with intense infrared pulses can trigger avalanche ionization, leading to the formation and subsequent expansion of a He nanoplasma. Here, we introduce a novel approach to probe the ICD dynamics over timescales spanning femtoseconds to nanoseconds. Our method exploits the efficient ignition of a nanoplasma through tunnel ionization of excited helium atoms attached to the droplets and the detection of XUV fluorescence emitted from the resulting nanoplasma. Using quantum mechanical and classical calculations, we interpret the nanosecond fluorescence decay as a signature of ICD mediated by He$^*$ freely roaming on the nanodroplet surface. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_09532 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | XUV fluorescence as a probe of interatomic Coulombic decay of resonantly excited He nanodroplets Sishodia, Keshav Ltaief, Ltaief Ben Scheel, Niklas Földes, István B. Roos, Andreas Hult Albrecht, Martin Staněk, Matyáš Jurkovičová, Lucie Hort, Ondrej Nejdl, Jaroslav García-Alfonso, Ernesto Halberstadt, Nadine Andreasson, Jakob Klimešová, Eva Krikunova, Maria Krishnan, Sivarama Heidenreich, Andreas Mudrich, Marcel Atomic and Molecular Clusters Superfluid He nanodroplets resonantly excited by extreme ultraviolet (XUV) pulses exhibit complex relaxation dynamics, including the formation of metastable excited He$^*$ atoms trapped in bubbles, the desorption of excited atoms from the droplet surface, and autoionization via interatomic Coulombic decay (ICD). Irradiation with intense infrared pulses can trigger avalanche ionization, leading to the formation and subsequent expansion of a He nanoplasma. Here, we introduce a novel approach to probe the ICD dynamics over timescales spanning femtoseconds to nanoseconds. Our method exploits the efficient ignition of a nanoplasma through tunnel ionization of excited helium atoms attached to the droplets and the detection of XUV fluorescence emitted from the resulting nanoplasma. Using quantum mechanical and classical calculations, we interpret the nanosecond fluorescence decay as a signature of ICD mediated by He$^*$ freely roaming on the nanodroplet surface. |
| title | XUV fluorescence as a probe of interatomic Coulombic decay of resonantly excited He nanodroplets |
| topic | Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2509.09532 |