Electron recombination with multicharged ions via chaotic many-electron states

29th International Conference on Photonic, Electronic, and Atomic Collisions

Berengut, J.C.^1 ; Flambaum, V.V.^1 ; Dzuba, V.A.^1 ; Gribakin, G.F.^1,2 ; Harabati, C.^1 ; Kozlov, M.G.^3,4

School of Physics, University of New South Wales, Sydney

NSW

2052, Australia^1

School of Mathematics and Physics, Queen's University, Belfast

BT7 1NN, United Kingdom^2

Petersburg Nuclear Physics Institute, Gatchina

188300, Russia^3

St. Petersburg Electrotechnical University, LETI, Prof. Popov Str. 5, St. Petersburg

197376, Russia^4

关键词: Autoionization;    Electron recombinations;    Fluorescence yield;    Multi-charged ion;    Recombination rate;    Statistical theory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/5/052029/pdf
DOI  :  10.1088/1742-6596/635/5/052029

来源: IOP

【 摘 要 】

Electron recombination with multicharged ions that have open f shells (e.g. Au25+and W20+) is dominated by chaotic many-electron resonances. They cause the fluorescence yield to dominate entirely at low energies leading to an enhancement of the recombination rate up to 1000 times. At higher energies the opening of many autoionization channels leads to a rapid decrease of the fluorescence yield. We apply the statistical theory to express the recombination cross section as a sum over the doorway (dielectronic) resonances.