Strong higher-order resonant contribution to Fe Kα x-ray line polarization in hot anisotropic plasmas

30th International Conference on Photonic, Electronic, and Atomic Collisions

Shah, Chintan^1,2 ; Amaro, Pedro^2 ; Steinbrügge, René^1 ; Bernitt, Sven^1,3 ; Fritzsche, Stephan^3 ; Surzhyko, Andrey^4 ; López-Urrutia, José R. Crespo^1 ; Tashenov, Stanislav^2

Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg

69117, Germany^1

Physikalisches Institut, Im Neunheimer feld 226, Heidelberg

69120, Germany^2

Friedrich-Schiller-Universität Jena, Fürstengraben 1, Jena

07743, Germany^3

Physikalisch-Technische Bundesanstalt, Braunschweig, Germany^4

关键词: Anisotropic plasmas;    Breit interaction;    Degree of polarization;    Higher-order;    Krypton ions;    Resonant contribution;    X-ray lines;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/6/052038/pdf
DOI  :  10.1088/1742-6596/875/6/052038

来源: IOP

【 摘 要 】

Synopsis We report the first systematic measurement of x-ray angular distribution and polarization following dielectronic, trielectronic and quadroelectronic recombination into He-like through O-like iron and krypton ions. The experimental data revealed that the the degree of polarization of x rays is dominated by relativistic Breit interaction and hitherto neglected higherorder trielectronic and quadroelectronic recombination resonances.