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Dielectronic satellite emission from a solid-density Mg plasma: Relationship to models of ionization potential depression.
Phys Rev E
April 2024
Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
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.
View Article and Find Full Text PDFThird-order algebraic diagrammatic construction theory for electron attachment and ionization energies: Conventional and Green's function implementation.
J Chem Phys
December 2019
Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA.
We present implementation of second- and third-order algebraic diagrammatic construction (ADC) theory for efficient and accurate computations of molecular electron affinities (EA), ionization potentials (IP), and densities of states [EA-/IP-ADC(n), n = 2, 3]. Our work utilizes the non-Dyson formulation of ADC for the single-particle propagator and reports working equations and benchmark results for the EA-ADC(2) and EA-ADC(3) approximations. We describe two algorithms for solving EA-/IP-ADC equations: (i) conventional algorithm that uses iterative diagonalization techniques to compute low-energy EA, IP, and density of states and (ii) Green's function algorithm (GF-ADC) that solves a system of linear equations to compute density of states directly for a specified spectral region.
View Article and Find Full Text PDFUse of the Bethe Equation for Inner-Shell Ionization by Electron Impact.
J Appl Phys
May 2016
Facultat de Física (ECM and ICC), Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain.
We analyzed calculated cross sections for K-, L-, and M-shell ionization by electron impact to determine the energy ranges over which these cross sections are consistent with the Bethe equation for inner-shell ionization. Our analysis was performed with K-shell ionization cross sections for 26 elements, with L-shell ionization cross sections for seven elements, with L-subshell ionization cross sections for Xe, and with M-shell ionization cross sections for three elements. The validity or otherwise of the Bethe equation could be checked with Fano plots based on a linearized form of the Bethe equation.
View Article and Find Full Text PDFDiagnostic of charge balance in high-temperature tungsten plasmas using LLNL EBIT.
Rev Sci Instrum
October 2008
Physics Department, University of Nevada, Reno, Nevada 89557, USA.
Diagnostic of high-temperature M-shell W plasmas is challenging because of contribution of numerous ionization stages in a relatively narrow x-ray spectral region. A method using LLNL EBIT data generated at different electron beam energies has been established for the identification of prominent spectral features and for the determination of charge balance in x-ray M-shell W spectra between 3.5 and 8.
View Article and Find Full Text PDFBenchmark measurements of the ionization balance of non-local-thermodynamic-equilibrium gold plasmas.
Phys Rev Lett
November 2007
Lawrence Livermore National Laboratory, L-473, Livermore, CA 94550, USA.
Article Synopsis
- The study focuses on measuring the ionization balance of gold plasmas under different conditions of electron density and temperature.
- Researchers utilized a detailed model to analyze gold emission spectra, revealing average ion charges ranging from 42 to 50.
- Findings show that lower temperatures lead to a strong response to external radiation, providing a crucial test for models of high Z ions in non-local thermodynamic equilibrium.
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