Astrophysical Line Diagnosis Requires Nonlinear Dynamical Atomic Modeling

被引：30

作者：

Oreshkina, Natalia S. ^{[1
]}

Cavaletto, Stefano M. ^{[1
]}

Keitel, Christoph H. ^{[1
]}

Harman, Zoltan ^{[1
]}

机构：

[1] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 14期

关键词：

FREE-ELECTRON LASER; FE-XVII; LABORATORY MEASUREMENTS; XMM-NEWTON; CHANDRA; SPECTROSCOPY; TRANSITIONS; SPECTRUM; CAPELLA;

D O I：

10.1103/PhysRevLett.113.143001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Line intensities and oscillator strengths for the controversial 3C and 3D astrophysically relevant lines in neonlike Fe16+ ions are calculated. A large-scale configuration-interaction calculation of oscillator strengths is performed with the inclusion of higher-order electron-correlation effects, suggesting that these contributions cannot explain existing discrepancies between theory and experiment. Then, we investigate nonlinear dynamical effects, showing that, for strong x-ray sources, the modeling of the spectral lines by a peak with an area proportional to the oscillator strength is not sufficient. The dynamical effects give a possible resolution of discrepancies of theory and experiment found by recent measurements, which motivates the use of light-matter interaction models also valid for strong light fields in the analysis and interpretation of astrophysical and laboratory spectra.

引用

页数：5

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