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Nuclear dissociation after the O 1s $\rightarrow (^4\Sigma_\text{u}^-)$3sσ excitation in O$_2$ molecules |
| Bocheng Ding(丁伯承)1,2,3, Ruichang Wu(吴睿昌)1,2, Yunfei Feng(封云飞)1,2, and Xiaojing Liu(刘小井)1,2,† |
1 School Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
2 Center for Transformative Science, ShanghaiTech University, Shanghai 201210, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract We investigate the dissociation dynamics of core-excited $\mathrm{O}_2$ molecules using a high-resolution energy-resolved electron-ion coincidence experimental setup. The excited cationic states with two valence holes and one Rydberg electron are created after spectator Auger decay induced by $\mathrm{O}$ 1s $\rightarrow (^4\Sigma_{\rm u}^-)3{\rm s}\sigma$ core excitation in $\mathrm{O}_2$. From the energy correlation between the kinetic energy of the Auger electron and the ion kinetic energy release, we distinguish several dissociation channels. Rather complex dissociation channels of the spectator Auger final states are disclosed, which can be explained by the increased number of the crossing point due to the existence of Rydberg electron. The quantum system will evolve into different dissociation limits at each crossing point between the potential energy curves.
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Received: 26 December 2021
Revised: 14 February 2022
Accepted manuscript online: 17 February 2022
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PACS:
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33.80.Gj
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(Diffuse spectra; predissociation, photodissociation)
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31.70.Hq
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(Time-dependent phenomena: excitation and relaxation processes, and reaction rates)
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32.80.Hd
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(Auger effect)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11574020), the Project of Thousand Youth Talents in China, and the Starting Grant of ShanghaiTech University. |
Corresponding Authors:
Xiaojing Liu
E-mail: liuxj@shanghaitech.edu.cn
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Cite this article:
Bocheng Ding(丁伯承), Ruichang Wu(吴睿昌), Yunfei Feng(封云飞), and Xiaojing Liu(刘小井) Nuclear dissociation after the O 1s $\rightarrow (^4\Sigma_\text{u}^-)$3sσ excitation in O$_2$ molecules 2022 Chin. Phys. B 31 083301
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