Towards a fast calculator for the radiation characteristics of radiative recombination and radiative electron capture

FAIR Next Generation ScientistS 2014

Weber, G.^1,2 ; Ding, H.^1,3 ; Herdrich, M.O.^1,3 ; Surzhykov, A.^1,2

Helmholtz-Institut Jena, Jena

07743, Germany^1

GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt

64291, Germany^2

Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena

07743, Germany^3

关键词: Approximate formulas;    Charge-changing process;    Few-electron systems;    Polarization properties;    Radiation characteristics;    Radiative electron capture;    Radiative recombination;    Reasonable accuracy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/599/1/012040/pdf
DOI  :  10.1088/1742-6596/599/1/012040

来源: IOP

【 摘 要 】

The radiative capture of free electrons (radiative recombination) and bound electrons (radiative electron capture) are among the most important charge changing processes for fast, highly-charged ions. While total cross sections can be obtained by an approximate formula with reasonable accuracy, the estimation of angular distributions and polarization properties of the emitted radiation requires a fully relativistic treatment that is numerical expensive. Therefore we recently started the development of a fast calculator for these radiation characteristics. The program is based on a grid of rigorously calculated data points for free- electron capture into bare ions, between which interpolation is performed to obtain radiation characteristics for specific collision systems. Also capture into few-electron systems is taken into account in an approximate way. We present first results from this development.