Double-excited resonant structure of photoionization |
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| Authors: | Jinchao Liu Xiangdong Yang Zongli Wang Yansong Cheng |
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| Institution: | (1) Institute of Physics, Sichuan Union University, 610065 Chengdu, China;(2) Department of Physics, University of Virginia, Charlottesville, 22901, VA, USA;(3) Institute of Physics, Sichuan Union University, 610065 Chengdu, China;(4) Department of Physics, Chongqing University, 630044 Chongqing, China;(5) Institute of Physics, Sichuan Union University, 610065 Chengdu, China |
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| Abstract: | The dominant diagrams were found in double-excited resonant structure of photoionization by using many-body perturbation theory.
Based on the characteristics of these diagrams, the couple-equation method was improved, and the summation of specific classes
of these diagrams is to an infinite order, and the resonant peaks with the widths are obtained first. The doubled-excited
resonant structures (2p, 3s)→(3p,np), (3p,nf), (3d,nd), (3d,ns) and (4s,ns) of the photoionization processes 2p→ks, kd are obtained. The photoionization with excitation process (2p, 3s)→(3p, kp)
was included in the calculations. The results of calculations are compared with the experimental data from 38.5 to 46.8 eV
photon energies, which are in good agreement with the experiment.
Project supported by the State Education Committee of China. |
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| Keywords: | double-excited resonance photoionization many-body perturbation |
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