Demonstration of Geometric Effects and Resonant Scattering in the X-Ray Spectra of High-Energy-Density Plasmas

被引：3

作者：

Perez-Callejo, G. ^{[1
]}

Marley, E., V ^{[2
]}

Liedahl, D. A. ^{[2
]}

Jarrott, L. C. ^{[2
]}

Kemp, G. E. ^{[2
]}

Heeter, R. F. ^{[2
]}

Emig, J. A. ^{[2
]}

Foord, M. E. ^{[2
]}

Schneider, M. B. ^{[2
]}

Rose, S. J. ^{[1
]}

Wark, J. S. ^{[1
]}

机构：

[1] Univ Oxford, Clarendon Lab, Dept Phys, Parks Rd, Oxford OX1 3PU, England

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 08期

关键词：

Geometry; -; Astrophysics;

D O I：

10.1103/PhysRevLett.126.085001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In a plasma of sufficient size and density, photons emitted within the system have a probability of being reabsorbed and reemitted multiple times-a phenomenon known in astrophysics as resonant scattering. This effect alters the ratio of optically thick to optically thin lines, depending on the plasma geometry and viewing angle, and has significant implications for the spectra observed in a number of astrophysical scenarios, but has not previously been studied in a controlled laboratory plasma. We demonstrate the effect in the x-ray spectra emitted by cylindrical plasmas generated by high power laser irradiation, and the results confirm the geometrical interpretation of resonant scattering.

引用

页数：7

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