Predictions of bound-bound transition signatures in x-ray Thomson scattering

• DOI: 10.48550/arxiv.2109.09576
• Publication Date: 2021-01-01
• Authors: Baczewski, Andrew D.; Hentschel, Thomas; Kononov, Alina; Hansen, Stephanie B.
• Keywords: 0106 biological sciences; Plasma Physics (physics.plasm-ph); Atomic Physics (physics.atom-ph); FOS: Physical sciences; Computational Physics (physics.comp-ph); Physics - Computational Physics; 01 natural sciences; Physics - Plasma Physics; Physics - Atomic Physics

Bound-bound transitions can occur when localized atomic orbitals are thermally depleted, allowing excitations that would otherwise be forbidden at zero temperature. We predict signatures of bound-bound transitions in x-ray Thomson scattering measurements of laboratory-accessible warm dense conditions. Efficient average-atom models amended to include quasibound states achieve continuity of observables under ionization and agree with time-dependent density functional theory in their prediction of these scattering signatures, which hold compelling diagnostic potential for high-energy-density experiments.<br/>6 pages, 3 figures. Preprint for PNP17<br/>