2024/02/13 by Gabriel J. Grell, Maurice A. Leutenegger, Grell, Gabriel J. +7 · 1 citation
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Astro and Planetary Science #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Geomagnetism and Paleomagnetism Studies #High Energy Astrophysical Phenomena (astro-ph.HE) #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Planetary Science and Exploration #Plasma Physics (physics.plasm-ph) #Solar and Stellar Astrophysics (astro-ph.SR)
paper · pdf · doi:10.48550/arxiv.2402.08767
openalex publication_date 2024/02/13 · openalex created_date 2024/02/16 · openalex updated_date 2026/07/28
We calculated cross sections for the dielectronic recombination (DR) satellite lines of Fe XVII and benchmarked our predictions with experimental cross sections of Fe XVII resonances that were mono-energetically excited in an electron beam ion trap. We extend the benchmark to all resolved DR and direct electron-impact excitation (DE) channels in the experimental dataset, specifically the n≥4 DR resonances of Fe XVII, complementing earlier investigations of n=3 channels. Our predictions overestimate by 20-25% the DR and DE absolute cross sections for the higher n complexes when using the same methods as in previous works. However, we achieve agreement within ∼10% of the experimental results by an approach in which we "forward fold" the predicted cross sections with the spread of the electron-beam energy and the photon-energy resolution of our experiment. We then calculated rate coefficients from the experimental and theoretical cross sections, finding departures of 10-20% from the rates found in the OPEN-ADAS atomic database.