X 射线共振光激发：高电荷态铁离子 Kα 跃迁的线宽和能量。
X-ray resonant photoexcitation: linewidths and energies of Kα transitions in highly charged Fe ions.
机构信息
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany and Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Gießen, Leihgesterner Weg 217, 35392 Gießen, Germany.
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
出版信息
Phys Rev Lett. 2013 Sep 6;111(10):103002. doi: 10.1103/PhysRevLett.111.103002. Epub 2013 Sep 5.
Photoabsorption by and fluorescence of the Kα transitions in highly charged iron ions are essential mechanisms for x-ray radiation transfer in astrophysical environments. We study photoabsorption due to the main Kα transitions in highly charged iron ions from heliumlike to fluorinelike (Fe24+ to Fe17+) using monochromatic x rays around 6.6 keV at the PETRA III synchrotron photon source. Natural linewidths were determined with hitherto unattained accuracy. The observed transitions are of particular interest for the understanding of photoexcited plasmas found in x-ray binary stars and active galactic nuclei.
高电荷态铁离子的 Kα 跃迁的光吸收和荧光是天体物理环境中 X 射线辐射传输的重要机制。我们使用 PETRA III 同步辐射光子源的约 6.6keV 的单色 X 射线研究了从类氦到类氟（Fe24+ 到 Fe17+）的高电荷态铁离子的主要 Kα 跃迁的光吸收。利用迄今未达到的精度确定了自然线宽。观察到的跃迁对于理解在 X 射线双星和活动星系核中发现的光激发等离子体特别重要。
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