Comprehensive Laboratory Benchmark of K-shell Dielectronic Satellites of Fe XXV-XXI Ions
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arXiv
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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866916749111197696 |
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| author | Shah, Chintan Amaro, Pedro Grilo, Filipe Gu, Ming Feng Gu, Liyi Santos, José Paulo Porter, F. Scott Pfeifer, Thomas Leutenegger, Maurice A. López-Urrutia, José R. Crespo |
| author_facet | Shah, Chintan Amaro, Pedro Grilo, Filipe Gu, Ming Feng Gu, Liyi Santos, José Paulo Porter, F. Scott Pfeifer, Thomas Leutenegger, Maurice A. López-Urrutia, José R. Crespo |
| contents | We report on comprehensive laboratory studies of the K-shell dielectronic recombination (DR) resonances of Fe XXV - XXI ions that prominently contribute to the hard X-ray spectrum of hot astrophysical plasmas. By scanning a monoenergetic electron beam to resonantly excite trapped Fe ions in an electron beam ion trap, and achieving a high electron-ion collision energy resolution of ~7 eV, we resolve their respective KL$n$ satellites up to n'=11. By normalization to known radiative recombination cross sections we also determine their excitation cross sections and that of the continuum with uncertainties below 15%, and verify our results with an independent normalization based on previous measurements. Our experimental data excellently confirm the accuracy and suitability of distorted-wave calculations obtained with the Flexible Atomic Code (FAC) for modeling astrophysical and fusion plasmas. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_14833 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Comprehensive Laboratory Benchmark of K-shell Dielectronic Satellites of Fe XXV-XXI Ions Shah, Chintan Amaro, Pedro Grilo, Filipe Gu, Ming Feng Gu, Liyi Santos, José Paulo Porter, F. Scott Pfeifer, Thomas Leutenegger, Maurice A. López-Urrutia, José R. Crespo Atomic Physics High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics Plasma Physics We report on comprehensive laboratory studies of the K-shell dielectronic recombination (DR) resonances of Fe XXV - XXI ions that prominently contribute to the hard X-ray spectrum of hot astrophysical plasmas. By scanning a monoenergetic electron beam to resonantly excite trapped Fe ions in an electron beam ion trap, and achieving a high electron-ion collision energy resolution of ~7 eV, we resolve their respective KL$n$ satellites up to n'=11. By normalization to known radiative recombination cross sections we also determine their excitation cross sections and that of the continuum with uncertainties below 15%, and verify our results with an independent normalization based on previous measurements. Our experimental data excellently confirm the accuracy and suitability of distorted-wave calculations obtained with the Flexible Atomic Code (FAC) for modeling astrophysical and fusion plasmas. |
| title | Comprehensive Laboratory Benchmark of K-shell Dielectronic Satellites of Fe XXV-XXI Ions |
| topic | Atomic Physics High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics Plasma Physics |
| url | https://arxiv.org/abs/2505.14833 |