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• W2765951909 abstract "We performed a reference-free measurement of the transition energies of the $1s 2p,^1P_1to 1s^2 ,^1S_0$ line in He-like argon, and of the $1s 2s^2 2p,^1P_1to 1s^2 2s^2,^1S_0$ line in Be-like argon ions. The highly-charged ions were produced in the plasma of an Electron-Cyclotron Resonance Ion Source. Both energy measurements were performed with an accuracy better than 3 parts in $10^6$, using a double flat-crystal spectrometer, without reference to any theoretical or experimental energy. The $1s 2s^2 2p,^1P_1to 1s^2 2s^2,^1S_0$ transition measurement is the first reference-free measurement for this core-excited transition. The $1s 2p,^1P_1to 1s^2 ,^1S_0$ transition measurement confirms recent measurement performed at the Heidelberg Electron-Beam Ion Trap (EBIT). The width measurement in the He-like transition provides test of a purely radiative decay calculations. In the case of the Be-like argon transition, the width results from the sum of a radiative channel and three main Auger channels. We also performed Multiconfiguration Dirac-Fock (MCDF) calculations of transition energies and rates and have done an extensive comparison with theory and other experimental data. For both measurements reported here, we find agreement with the most recent theoretical calculations within the combined theoretical and experimental uncertainties." @default.
• W2765951909 created "2017-11-10" @default.
• W2765951909 creator A5012597152 @default.
• W2765951909 creator A5021371234 @default.
• W2765951909 creator A5045641437 @default.
• W2765951909 creator A5049387574 @default.
• W2765951909 creator A5057297396 @default.
• W2765951909 creator A5084168595 @default.
• W2765951909 creator A5084779127 @default.
• W2765951909 creator A5085686437 @default.
• W2765951909 creator A5086449817 @default.
• W2765951909 date "2018-03-26" @default.
• W2765951909 modified "2023-10-17" @default.
• W2765951909 title "High-precision measurements of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>n</mml:mi><mml:mo>=</mml:mo><mml:mn>2</mml:mn><mml:mo>→</mml:mo><mml:mi>n</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math> transition energies and level widths in He- and Be-like argon ions" @default.
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