Dielectronic satellite emission from a solid-density Mg plasma: relationship to models of ionisation potential depression

Journal article

We report on experiments where solid-density Mg plasmas are created by heating with the focused output of the Linac Coherent Light Source x-ray free-electron laser. We study the K-shell emission from the helium- and lithium-like ions using Bragg crystal spectroscopy. Observation of the dielectronic satellites in lithium-like ions confirms that the M-shell electrons appear bound for these high charge states. An analysis of the intensity of these satellites indicates that when modeled with an atomic-kinetics code, the ionization potential depression model employed needs to produce depressions for these ions which lie between those predicted by the well known Stewart-Pyatt and Ecker-Kroll models. These results are largely consistent with recent density functional theory calculations.

Authors: Pérez-Callejo, G; Gawne, T; Preston, TR; Hollebon, P; Vinko, SAM

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Physical Society
• Journal: Physical Review E
• Volume: 109
• Issue: 4
• Article number: 045204
• Publication date: 2024-04-10
• Acceptance date: 2024-03-02
• DOI: 10.1103/PhysRevE.109.045204
• EISSN: 2470-0053
• ISSN: 2470-0045
• Language: English
• Keywords: FFR