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arXiv 1301.3440physics.plasm-ph
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热致密物质对X射线汤姆逊散射的共振束缚-自由贡献

Resonant Bound-Free Contributions to Thomson Scattering of X-rays by Warm Dense Matter

W. R. Johnson, J. Nilsen, K. T. Cheng

摘要:

最近的计算[Nilsen et al. arXiv:1212.5972]预测,在金属密度和T=12 eV下,铬(Z=24)中3s和3 p束缚态对散射光子光谱的贡献低于相应的束缚态阈值。这些共振被证明是密切相关的连续降低,在自由原子中的3D束缚态溶解成共振l=2分波的连续。由此产生的d-态共振占主导地位的贡献的束缚-自由的动态结构功能,导致预测的共振散射X射线光谱。在周期表中Ca和Mn(20 <= Z <= 25)之间的所有元素中显示出类似的共振特征。

英文摘要:

Recent calculations [Nilsen et al. arXiv:1212.5972] predict that contributions to the scattered photon spectrum from 3s and 3p bound states in chromium (Z=24) at metallic density and T=12 eV resonate below the respective bound-state thresholds. These resonances are shown to be closely related to continuum lowering, where 3d bound states in the free atom dissolve into a resonant l=2 partial wave in the continuum. The resulting d-state resonance dominates contributions to the bound-free dynamic structure function, leading to the predicted resonances in the scattered X-ray spectrum. Similar resonant features are shown to occur in all elements in the periodic table between Ca and Mn (20 <= Z <= 25).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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