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Mutual neutralization in low-energy collisions of Na+ + H- ions |
| Kun Wang(王堃)1, Chuan Dong(董川)1, Yizhi Qu(屈一至)2,†, Yong Wu(吴勇)3, Xiaohe Lin(林晓贺)4,‡, and Robert J. Buenker5 |
1. Institute of Environmental Science, Shanxi University, Taiyuan 030006, China;
2. College of Material Sciences and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
3. National Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
4. Faculty of Foundation, Space Engineering University, Beijing 101416, China;
5. Fachbereich C-Mathematik und Naturwissenschaften, Bergische Universitat Wuppertal, D-42097 Wuppertal, Germany |
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Abstract The low-energy mutual neutralization (MN) reactions Na+ + H- →Na(nl) + H have been studied by employing the full quantum-mechanical molecular-orbital close-coupling (QMOCC) method over a wide energy range of 10-3-103 eV/u. Total and state-selective cross sections have been investigated and compared with the available theoretical and experimental data, and the state-selective rate coefficients for the temperature range of 100-10000 K have been obtained. In the present work, all the necessary highly excited states are included, and the influences of rotational couplings and 10 active electrons are considered. It is found that in the energy below 10 eV/u, the Na(4s) state is the most dominant exit state with a contribution of approximately 78% to the branch fraction, which is in best agreement with the experimental data. For energies above 10 eV/u, the MN total cross section is larger than those obtained in other theoretical calculations and shows a slow decreasing trend because the main exit states change, when the energy is above 100 eV/u, the dominant exit state becomes the Na(3p) state, while the Na(4s) state becomes the third most important exit state. The datasets presented in this paper, including the potential energy curve, the radial and rotational couplings, the total and state-selective cross sections, are openly available at https://doi.org/10.57760/sciencedb.j00113.00112.
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Received: 21 April 2023
Revised: 15 May 2023
Accepted manuscript online: 17 May 2023
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PACS:
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31.15.A-
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(Ab initio calculations)
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34.70.+e
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(Charge transfer)
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34.20.-b
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(Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.12204288, 11934004,and 12203106). |
Corresponding Authors:
Yizhi Qu, Xiaohe Lin
E-mail: yzqu@ucas.ac.cn;xiaohelin1989@163.com
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Cite this article:
Kun Wang(王堃), Chuan Dong(董川), Yizhi Qu(屈一至), Yong Wu(吴勇), Xiaohe Lin(林晓贺), and Robert J. Buenker Mutual neutralization in low-energy collisions of Na+ + H- ions 2023 Chin. Phys. B 32 083103
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