Three-body fragmentation dynamics of OCS3+ induced by intermediate energy Ne4+ ion impact
文献类型：期刊论文
| 作者 | Feng Wen-Tian2 ; Zhang Shao-Feng2; Zhu Xiao-Long2; Ma Xin-Wen2; Yan Shun-Cheng2; Shen Li-Li1,2; Zhao Dong-Mei2; Zhang Min1,2; Hai Bang1,2; Gao Yong2
|
| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2018-02-20 |
| 卷号 | 67期号:4页码:043401 |
| 关键词 | carbonyl sulphide dissociation mechanism sequential dissociation kinetic energy release |
| ISSN号 | 1000-3290 |
| DOI | 10.7498/aps.67.20172163 |
| 英文摘要 | The fragmentation experiment of OCS3+ induced by 56 keV/u Ne4+ ions is performed using reaction microscope, and the corresponding dissociation dynamics is investigated. By detecting the three fragment ions in coincidence, the three-dimensional (3D) momenta of all ions and the corresponding kinetic energy release (KER) distributions are reconstructed. It is found that a peak maximum of the KER distribution is locates at about 25 eV, and a shoulder structure appears around 18 eV. This result is consistent with previous heavy ion experimental results with different perturbation strengths. Taking into account that the KER distribution is related to the initial state population of the OCS3+ parent ions, it can be concluded that the perturbation strength is not a decisive parameter leading to the initial state population of OCS3+ ions. We also reconstruct the Newton diagram and Dalitz plot for the three-body fragmentation of OCS3+ ion, from which the sequential dissociation is distinguished from nonsequential dissociation clearly. By analyzing the kinetic energy of ions from each fragmentation process, we find that the KER peak at 25 eV corresponds to nonsequential dissociation process, but the shoulder at 18 eV arises from both sequential and nonsequential dissociation processes. This phenomenon suggests that the parent OCS3+ ions in ground state and low excitation states tend to fragment through sequential dissociation, while those in high excitation states tend to fragment through nosequential dissociation. Furthermore, we reconstruct the KER distributions in the second fragmentation step of sequential dissociation, whose peak maximum is at 6.2 eV, corresponding to X-3 Pi, (1)Sigma(+) and (1)Pi metastable states of CO2+ ion. A similar KER distribution is obtained for the second fragmentation step of the OCS4+ ion. By comparing our experimental results with previous ones, we conclude that the origin of sequential dissociation process is the existence of metastable state, and the reconstructed KER in the second step reflects the initial state information about the metastable state. |
| 资助项目 | National Key R&D Program of China[2017YFA0402300] ; National Nature Science Foundation of China[U1532129] ; National Nature Science Foundation of China[11304325] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000428113200008 |
| 出版者 | CHINESE PHYSICAL SOC |
| 资助机构 | National Key R&D Program of China ; National Nature Science Foundation of China |
| 源URL | [http://119.78.100.186/handle/113462/46424]  |
| 专题 | 近代物理研究所_实验物理中心 |
| 通讯作者 | Ma Xin-Wen; Yan Shun-Cheng |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng Wen-Tian,Zhang Shao-Feng,Zhu Xiao-Long,et al. Three-body fragmentation dynamics of OCS3+ induced by intermediate energy Ne4+ ion impact[J]. ACTA PHYSICA SINICA,2018,67(4):043401. |
| APA | Feng Wen-Tian.,Zhang Shao-Feng.,Zhu Xiao-Long.,Ma Xin-Wen.,Yan Shun-Cheng.,...&Zhang Peng-Ju.(2018).Three-body fragmentation dynamics of OCS3+ induced by intermediate energy Ne4+ ion impact.ACTA PHYSICA SINICA,67(4),043401. |
| MLA | Feng Wen-Tian,et al."Three-body fragmentation dynamics of OCS3+ induced by intermediate energy Ne4+ ion impact".ACTA PHYSICA SINICA 67.4(2018):043401. |
入库方式： OAI收割
来源：近代物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。