Oxygen Opacity Measurements at High-Energy-Density Conditions
We present the first benchmark measurements of oxygen opacity at high-energy-density, crucial for understanding stellar interiors. A 3-5-μm thick SiO_{2} sample was heated using a Z facility x-ray source, and opacity was measured in the 5-19.5 Å range with multiple spectrometers. The electron temperature and density inferred from Si K-shell spectra were 148±4 eV and 8.6±1.4× 10^{21} cm^{-3}, respectively. Six experiments showed opacity reproducibility within ±15% and 5%-25% opacity uncertainty. Measured oxygen opacity and seven different opacity models exhibit extraordinary overall agreement. Discrepancies near the H-like photon ionization threshold and in certain spectral lines suggest the need for model refinements.
Authors
- C. Blancard (ORCID: https://orcid.org/0000-0003-4710-175X)
- Daniel Åberg (ORCID: https://orcid.org/0000-0003-4364-9419)
- Ming Feng Gu (ORCID: https://orcid.org/0000-0001-9136-8449)
- Carlos Monton (ORCID: https://orcid.org/0000-0003-3472-873X)
- Guillaume Loisel (ORCID: https://orcid.org/0000-0001-9773-0875)
- Daniel Mayes
- R. Santana (ORCID: https://orcid.org/0009-0007-8878-8654)
- F. Gilleron (ORCID: https://orcid.org/0000-0002-5767-8336)
- G. S. Dunham (ORCID: https://orcid.org/0000-0001-7407-8968)
- H. Huang (ORCID: https://orcid.org/0009-0004-2217-5597)
- Taisuke Nagayama (ORCID: https://orcid.org/0000-0001-9114-6977)
- Thomas Gomez (ORCID: https://orcid.org/0000-0001-8748-5466)
- Ph. Cossé (ORCID: https://orcid.org/0000-0002-5608-1087)
- J. Colgan (ORCID: https://orcid.org/0000-0003-1045-3858)
- Carlos A. Iglesias (ORCID: https://orcid.org/0000-0002-6373-8921)
- Jean‐Christophe Pain (ORCID: https://orcid.org/0000-0002-7825-1315)
- G. Faussurier (ORCID: https://orcid.org/0000-0002-2395-040X)
- Christopher J. Fontes (ORCID: https://orcid.org/0000-0003-1087-2964)
- Stephanie B. Hansen (ORCID: https://orcid.org/0000-0002-1886-9770)
- I. Golovkin (ORCID: https://orcid.org/0000-0002-4985-0386)
- Bruce W Wilson (ORCID: https://orcid.org/0000-0002-3688-6849)
- J. E. Bailey (ORCID: https://orcid.org/0009-0000-5381-4620)
Institutions
- Lawrence Livermore National Laboratory (US)
- Los Alamos National Laboratory (US)
- University of Colorado Boulder (US)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Université Paris-Saclay (FR)
- University of Colorado System (US)
- CEA DAM Île-de-France (FR)
- Sandia National Laboratories (US)
- Prism Computational Sciences (United States) (US)
- General Atomics (United States) (US)
- The University of Texas at Austin (US)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-11-12
- DOI
- https://doi.org/10.1103/n2k6-358d
- Citations
- 2
- Primary Topic
- Astronomy and Astrophysical Research
- Type
- article
- Field-Weighted Citation Impact
- 2.38
Funders
- U.S. Department of Energy
- Ohio State University
- National Nuclear Security Administration
- Observatoire de Paris, Université de Recherche Paris Sciences et Lettres
- Lawrence Livermore National Laboratory
- Sandia National Laboratories
- Los Alamos National Laboratory