Quantum Molecular Dynamics calculations of radiative opacities

Free access article

Issue		A&A Volume 405, Number 1, July I 2003


Page(s)		L5 - L9
Section		Letters
DOI		http://dx.doi.org/10.1051/0004-6361:20030759

A&A 405, L5-L9 (2003)
DOI: 10.1051/0004-6361:20030759

Letter

Quantum Molecular Dynamics calculations of radiative opacities

S. Mazevet, L. A. Collins, N. H. Magee, J. D. Kress and J. J. Keady

Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
(Received 11 April 2003 / Accepted 7 May 2003 )

Abstract
We show that Quantum Molecular Dynamics provides a powerful tool to extend and benchmark current opacities libraries into the complex regime of warm dense matter. In this regime, the medium can be constituted of electrons, protons, atoms and molecules, while plasma and many-body effects can not be treated as perturbations. Among the most notable features of this new approach for calculating Rosseland mean opacities is the ability to obtain a consistent set of material (equation-of-state), optical and electrical properties for various mixtures from the same simulation.

Key words: atomic processes -- dense matter -- equation of state -- plasmas -- radiation mechanisms: general -- planets and satellites: general

Offprint request: S. Mazevet, sdm@t4.lanl.gov

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