K-shell photoabsorption edge of a dense aluminum plasma

A theoretical model for the calculation of the {ital K}-shell photoabsorption edge in a dense plasma is described. In the model, degeneracy and continuum lowering contributions due to free electrons and neighboring ions were treated as perturbations on the continuum and the bound state. These contri...

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Bibliographic Details
Published in:Physical review. A, General physics General physics, 1989-10, Vol.40 (8), p.4521-4526
Main Authors: Godwal, BK, Ng, A, Da Silva L, Lee, YT, Liberman, DA
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101 - Fusion Energy- Plasma Research- Confinement, Heating, & Production
ABSORPTION SPECTRA
ALUMINIUM
CALCULATION METHODS
COMPRESSION
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY LEVELS
K SHELL
METALS
PLASMA
SHOCK WAVES
SOLID-STATE PLASMA
SPECTRA
SPECTRAL SHIFT
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Summary:A theoretical model for the calculation of the {ital K}-shell photoabsorption edge in a dense plasma is described. In the model, degeneracy and continuum lowering contributions due to free electrons and neighboring ions were treated as perturbations on the continuum and the bound state. These contributions were evaluated using first-principles solid-state methods. The model was used to interpret recently observed shifts in the {ital K}-shell photoabsorption-edge energy in shock-compressed aluminum. The validity of the model was further examined through comparisons with two average-atom, self-consistent-field calculations and an augmented-plane-wave calculation.
ISSN:0556-2791
DOI:10.1103/PhysRevA.40.4521