Photoionization of temperature-controlled nanoparticles in a beam: Accurate and efficient determination of ionization energies and work functions
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911451939078144 |
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| author | Sheekhoon, Atef A. Haridy, Abdelrahman O. Pedalino, Sebastian Kresin, Vitaly V. |
| author_facet | Sheekhoon, Atef A. Haridy, Abdelrahman O. Pedalino, Sebastian Kresin, Vitaly V. |
| contents | A beam of free alkali metal nanoparticles is produced by a condensation source, passed through a thermalizing tube adjustable over a broad temperature range, and ionized by tunable light. High stability of the particle flux and an automated data acquisition routine allow efficient collection of photoionization yield curves. A careful fit of the data to the universal Fowler function makes it possible to obtain nanoparticle ionization energies, and from those, the metal work functions, with $\sim$0.2% precision. The experimental arrangement, nanoparticle thermalization rates, and ionization threshold analysis are described in detail. The use of ultrapure and temperature-controlled gas-phase nanoparticles facilitates the analysis of electronic properties, such as work functions, and of their interplay with thermal lattice dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_15426 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Photoionization of temperature-controlled nanoparticles in a beam: Accurate and efficient determination of ionization energies and work functions Sheekhoon, Atef A. Haridy, Abdelrahman O. Pedalino, Sebastian Kresin, Vitaly V. Mesoscale and Nanoscale Physics Materials Science Atomic and Molecular Clusters Chemical Physics A beam of free alkali metal nanoparticles is produced by a condensation source, passed through a thermalizing tube adjustable over a broad temperature range, and ionized by tunable light. High stability of the particle flux and an automated data acquisition routine allow efficient collection of photoionization yield curves. A careful fit of the data to the universal Fowler function makes it possible to obtain nanoparticle ionization energies, and from those, the metal work functions, with $\sim$0.2% precision. The experimental arrangement, nanoparticle thermalization rates, and ionization threshold analysis are described in detail. The use of ultrapure and temperature-controlled gas-phase nanoparticles facilitates the analysis of electronic properties, such as work functions, and of their interplay with thermal lattice dynamics. |
| title | Photoionization of temperature-controlled nanoparticles in a beam: Accurate and efficient determination of ionization energies and work functions |
| topic | Mesoscale and Nanoscale Physics Materials Science Atomic and Molecular Clusters Chemical Physics |
| url | https://arxiv.org/abs/2602.15426 |