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High-resolution charge-exchange spectroscopy of Si13+/14+ ions with an X-ray microcalorimeter

Charge exchange between highly charged ions and neutral atoms at collision energies in the keV range occurs in many astrophysical environments. Modeling this quasi-molecular process is difficult, and accurate laboratory data are scarce. We report charge-exchange measurements of highly charged silico...

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Hauptverfasser: Botz, Marc (Verfasst von) , Shah, Chintan (Verfasst von) , Gottardi, Luciano (Verfasst von) , de Wit, Martin (Verfasst von) , Gu, Liyi (Verfasst von) , Danisch, Jonas (Verfasst von) , Pajot, François (Verfasst von) , Pfeifer, Thomas (Verfasst von) , Crespo López-Urrutia, José Ramon (Verfasst von)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 08 May 2026
In: European physical journal special topics
Year: 2026, Jahrgang: 235, Heft: 15, Pages: 3457-3473
ISSN:1951-6401
DOI:10.1140/epjs/s11734-026-02355-2
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1140/epjs/s11734-026-02355-2
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Verfasserangaben:Marc Botz, Chintan Shah, Luciano Gottardi, Martin de Wit, Liyi Gu, Jonas Danisch, François Pajot, Thomas Pfeifer, and José R. Crespo López-Urrutia
Beschreibung
Zusammenfassung:Charge exchange between highly charged ions and neutral atoms at collision energies in the keV range occurs in many astrophysical environments. Modeling this quasi-molecular process is difficult, and accurate laboratory data are scarce. We report charge-exchange measurements of highly charged silicon ions using a superconducting transition-edge X-ray microcalorimeter with an energy resolution of approximately 2 eV FWHM at the Si K$$_\alpha$$energy and an electron beam ion trap. By using its magnetic trapping mode, i. e, cyclically turning the electron beam on and off, we isolate charge-exchange-induced emission and distinguish radiative cascade features unresolved with semiconductor detectors. These measurements can help isolating their contributions to the X-ray spectra of hot astrophysical plasmas from the dominant thermal excitation mechanisms, in particular for Rydberg states of the highly charged ions. Additionally, we present high resolution spectra of the Si Li-like K$$_\beta$$- to K$$_\epsilon$$-transitions observed during the beam-on phase.
Beschreibung:Online veröffentlicht: 08. Mai 2026
Gesehen am 13.08.2026
Im Titel sind die Zahlen 13 und 14 sowie die Pluszeichen hochgestellt
Beschreibung:Online Resource
ISSN:1951-6401
DOI:10.1140/epjs/s11734-026-02355-2

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