| 基于阈值光电子-光离子符合技术的分子离子光谱和解离动力学研究 |
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| 引用本文： | 唐小锋,牛铭理,周晓国,刘世林.基于阈值光电子-光离子符合技术的分子离子光谱和解离动力学研究[J].物理学报,2010,59(10):6940-6947. |
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| 作者姓名： | 唐小锋 牛铭理 周晓国 刘世林 |
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| 作者单位： | 合肥微尺度物质科学国家实验室,筹,中国科学技术大学化学物理系,合肥,230026 |
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| 基金项目： | 国家自然科学基金(批准号:21027005,10979042 )、国家重点基础研究发展计划(批准号:2007CB815204)和教育部创新计划同步辐射研究生创新基金(批准号:20080141S )资助的课题. |
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| 摘 要： | 对电子和离子同时采用速度聚焦电场收集的阈值光电子-光离子符合成像谱仪能够有效提高电子的收集效率和能量分辨率.利用该符合成像谱仪,开展了Xe/Ar/Ne 惰性混合气体及NO 分子的阈值光电子谱、阈值光电子-光离子符合质谱和质量选择的符合光谱等实验研究,精确测量了NO 分子的电离势,并且获得了NO+离子振动态分辨的X1Σ+,c3Π和B1
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| 关 键 词： | 符合光谱 阈值光电子 同步辐射 解离动力学 |
| 收稿时间： | 2009-12-16 |
Spectroscopic studies of molecular ions and their dissociation dynamics by the threshold photoelectron-photoion coincidence |
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| Tang Xiao-Feng,Niu Ming-Li,Zhou Xiao-Guo,Liu Shi-Lin.Spectroscopic studies of molecular ions and their dissociation dynamics by the threshold photoelectron-photoion coincidence[J].Acta Physica Sinica,2010,59(10):6940-6947. |
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| Authors: | Tang Xiao-Feng Niu Ming-Li Zhou Xiao-Guo Liu Shi-Lin |
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| Institution: | Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | In a recently built threshold photoelectron-photoion coincidence spectrometer, the photoelectrons and photoions were velocity-focused simultaneously to effectively improve the collection efficiency and the energy resolution. With this spectrometer we measured the threshold photoelectron spectra (TPES) and the mass-selected threshold photoelectron-photoion coincidence mass spectra (TPEPICO-MS) of NO molecules, as well as Xe/Ar/Ne rare gas mixtures. The ionization potential of NO was accurately determined, and the vibrationally resolved TPES spectra of the X1Σ+, c3Π and B1Π states of NO+ were obtained. Subsequently, the dissociation dynamics of the c3Π state of NO+ were studied by measuring the TPEPICO-MS and fitting the time-of-flight profile of the N+ fragment. The overall kinetic energy released from dissociation was determined to be 0.717 eV. |
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| Keywords: | coincidence spectroscopy threshold photoelectron synchrotron radiation dissociation dynamics |
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