Demonstration of Geometric Effects and Resonant Scattering in the X-Ray Spectra of High-Energy-Density Plasmas
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 plasm...
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| Veröffentlicht in: | Physical review letters 2021-02, Vol.126 (8), p.085001-085001, Article 085001 |
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| container_title | Physical review letters |
| container_volume | 126 |
| creator | Pérez-Callejo, G Marley, E V Liedahl, D A Jarrott, L C Kemp, G E Heeter, R F Emig, J A Foord, M E Schneider, M B Rose, S J Wark, J S |
| description | 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. |
| doi_str_mv | 10.1103/PhysRevLett.126.085001 |
| format | Article |
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(LLNL), Livermore, CA (United States)</creatorcontrib><title>Demonstration of Geometric Effects and Resonant Scattering in the X-Ray Spectra of High-Energy-Density Plasmas</title><title>Physical review letters</title><addtitle>Phys Rev Lett</addtitle><description>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. 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| ispartof | Physical review letters, 2021-02, Vol.126 (8), p.085001-085001, Article 085001 |
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| source | American Physical Society Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY Astrophysics Cylindrical plasmas Density energy-dispersive x-ray spectroscopy High power lasers high-energy-density plasmas Scattering Spectral emittance spectroscopy X ray spectra x-ray emission spectroscopy |
| title | Demonstration of Geometric Effects and Resonant Scattering in the X-Ray Spectra of High-Energy-Density Plasmas |
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