X-Ray Resonant Photoexcitation: Linewidths and Energies of K alpha Transitions in Highly Charged Fe Ions

作者：Rudolph J K^*; Bernitt S; Epp S W; Steinbruegge R; Beilmann C; Brown G V; Eberle S; Graf A; Harman Z; Hell N; Leutenegger M; Mueller A; Schlage K; Wille H C; Yavas H; Ullrich J; Lopez Urrutia J R Crespo

来源：Physical Review Letters, 2013, 111(10): 103002.

DOI：10.1103/PhysRevLett.111.103002

Photoabsorption by and fluorescence of the K alpha transitions in highly charged iron ions are essential mechanisms for x-ray radiation transfer in astrophysical environments. We study photoabsorption due to the main K alpha 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.

• 出版日期2013-9-5