All-Order Full-Coulomb Quantum Spectral Line-Shape Calculations,Physical Review Letters

当前位置： X-MOL 学术 › Phys. Rev. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

All-Order Full-Coulomb Quantum Spectral Line-Shape Calculations
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-12-01 , DOI: 10.1103/physrevlett.127.235001
T A Gomez ₁ , T Nagayama ₁ , P B Cho ₂ , M C Zammit ₃ , C J Fontes ₃ , D P Kilcrease ₃ , I Bray ₄ , I Hubeny ₅ , B H Dunlap ₂ , M H Montgomery ₂ , D E Winget ₂

Affiliation

Understanding how atoms interact with hot dense matter is essential for astrophysical and laboratory plasmas. Interactions in high-density plasmas broaden spectral lines, providing a rare window into interactions that govern, for example, radiation transport in stars. However, up to now, spectral line-shape theories employed at least one of three common approximations: second-order Taylor treatment of broadening operator, dipole-only interactions between atom and plasma, and classical treatment of perturbing electrons. In this Letter, we remove all three approximations simultaneously for the first time and test the importance for two applications: neutral hydrogen and highly ionized magnesium and oxygen. We found 15%–50% change in the spectral line widths, which are sufficient to impact applications including white-dwarf mass determination, stellar-opacity research, and laboratory plasma diagnostics.

中文翻译：

全阶全库仑量子谱线形计算

了解原子如何与热致密物质相互作用对于天体物理学和实验室等离子体至关重要。高密度等离子体中的相互作用拓宽了谱线，提供了一个罕见的窗口，可以了解控制例如恒星中辐射传输的相互作用。然而，到目前为止，谱线形状理论至少采用了三种常见近似中的一种：加宽算子的二阶泰勒处理、原子和等离子体之间仅偶极子的相互作用以及扰动电子的经典处理。在这封信中，我们第一次同时删除了所有三个近似值，并测试了两个应用的重要性：中性氢和高度电离的镁和氧。我们发现谱线宽度有 15%–50% 的变化，这足以影响包括白矮星质量测定在内的应用，

更新日期：2021-12-01

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11