| Low-Energy Rate Enhancement in Recombination Processes of Electrons into Bare Uranium Ions |
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| 作者姓名： | 吴勇 曾思良 段斌 颜君 王建国 董晨钟 马新文 |
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| 作者单位： | [1]Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, PO Box 8009-57, Beijing 100088 [2]Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 [3]Department of Physics, Northwest Normal University, Lanzhou 730000 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10604011, 10574018 and 10574020, and the National High-Tech ICF Committee in China. |
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| 摘 要： | Based on the Dirac-Fork-Slater method combined with the multichannel quantum defect theory, the recombination processes of electrons into bare uranium ions （U92＋） are investigated in the relative energy range close to zero, and the x-ray spectrum emitted in the direct radiative recombination and cascades processes are simulated. Compared with the recent measurement, it is found that the rate enhancement comes from the additional populations on high Rydberg states. These additional populations may be produced by other recombination mechanisms, such as the external electric-magnetic effects and the many-body correlation effects, which still remains an open problem.
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| 关 键 词： | 铀离子 低能率 重组过程 量子效应 |
| 收稿时间： | 2006-11-30 |
| 修稿时间： | 2006-11-30 |
Low-Energy Rate Enhancement in Recombination Processes of Electrons into Bare Uranium Ions |
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| WU Yong,ZENG Si-Liang,DUAN Bin,YAN Jun,WANG Jian-Guo,DONG Chen-Zhong,MA Xin-Wen.Low-Energy Rate Enhancement in Recombination Processes of Electrons into Bare Uranium Ions[J].Chinese Physics Letters,2007,24(2):404-407. |
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| Authors: | WU Yong ZENG Si-Liang DUAN Bin YAN Jun WANG Jian-Guo DONG Chen-Zhong MA Xin-Wen |
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| Institution: | 1 Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, PO Box 8009-57, Beijing 100088 2 Instltute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 ;3. Department of Physics, Northwest Normal University, Lanzhou 730000 |
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| Abstract: | Based on the Dirac--Fork--Slater method combined with the multichannel quantum defect theory, the recombination processes of electrons into bare uranium ions (U 92+ ) are investigated in the relative energy range close to zero, and the x-ray spectrum emitted in the direct radiative recombination and cascades processes are simulated. Compared with the recent measurement, it is found that the rate enhancement comes from the additional populations on high Rydberg states. These additional populations may be produced by other recombination mechanisms, such as the external electric-magnetic effects and the many-body correlation effects, which still remains an open problem. |
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| Keywords: | 34 80 Lx 32 30 Rj |
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