| 振动态选择的NO2+离子e3B2态解离生成氧离子通道的动力学 |
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| 引用本文： | 牛铭理,宋磊,唐小锋,周晓国,刘世林,刘付轶,单晓斌,盛六四.振动态选择的NO2+离子e3B2态解离生成氧离子通道的动力学[J].物理化学学报,2011,27(8):1797-1802. |
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| 作者姓名： | 牛铭理 宋磊 唐小锋 周晓国 刘世林 刘付轶 单晓斌 盛六四 |
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| 作者单位： | 1. Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China;
2. National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230029, P. R. China |
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| 基金项目： | 国家自然科学基金(10979042,21073173); 国家重点基础研究发展规划项目(973)(2007CB815204)资助~~ |
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| 摘 要： | 结合最新的阈值光电子-光离子符合速度成像技术和同步辐射光电离, 开展了振动态选择的NO2+离子e3B2态解离动力学研究. 在18.8-19.2 eV范围内获得的NO2+离子e3B2态的振动分辨阈值光电子谱与前人结果基本符合, 而由e3B2态(0,0,0)和(1,0,0)振动能级解离生成的O+碎片离子的符合速度成像清楚地显示出多个圆环结构, 表明解离过程中生成了多种具有不同速度的O+离子, 对应中性解离碎片NO分子处于不同的内态. 通过速度和角度积分, 我们分别获得了解离过程中释放的总平动能分布和O+离子的角度分布, 其中两振动态选择的NO2+离子解离生成的NO分子X2Π态振动分布十分相似, 主要布居的振动量子数为3-5. 解离释放的可资用能近似平均分配到碎片的平动能和内能, 其中碎片总平动能约占52%, 内能约占48%. 此外, O+离子的各向异性参数β约为0.3, 且不随NO(X2Π)振动量子数而剧烈变化.
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| 关 键 词： | 解离动力学 光电离 阈值光电子谱 光电子-光离子符合 速度成像 |
| 收稿时间： | 2011-02-28 |
| 修稿时间： | 2011-05-23 |
Dissociation Dynamics of O~+ Formation Channels from Vibrational State-Selected NO_2~+ at e~3B_2 State |
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| NIU Ming-Li,SONG Lei,TANG Xiao-Feng,ZHOU Xiao-Guo,LIU Shi-Lin,LIU Fu-Yi,SHAN Xiao-Bin,SHENG Liu-Si.Dissociation Dynamics of O~+ Formation Channels from Vibrational State-Selected NO_2~+ at e~3B_2 State[J].Acta Physico-Chimica Sinica,2011,27(8):1797-1802. |
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| Authors: | NIU Ming-Li SONG Lei TANG Xiao-Feng ZHOU Xiao-Guo LIU Shi-Lin LIU Fu-Yi SHAN Xiao-Bin SHENG Liu-Si |
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| Institution: | 1. Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China;
2. National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230029, P. R. China |
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| Abstract: | The dissociation dynamics of vibrational state-selected NO2+(e3B2) was investigated using threshold photoelectron-photoion coincidence velocity imaging and photoionization by synchrotron radiation.The vibrational resolution threshold photoelectron spectrum of NO2+(e3B2) was recorded in the energy range of 18.8-19.2 eV and was consistent with previous measurements.Furthermore,the coincident velocity images of the O+ fragments that dissociated from the(0,0,0) and(1,0,0) vibronic levels of NO2+(e3B2) showed a ... |
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| Keywords: | Dissociation dynamics Photoionization Threshold photoelectron spectrum Photoelectron-photoion coincidence Velocity map imaging |
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