| Optically Forbidden Transition of A＇3Δu ← X3Σg-in Oxygen |
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| 引用本文： | 朱林繁,徐卫青,孙建敏,张文耀.Optically Forbidden Transition of A＇3Δu ← X3Σg-in Oxygen[J].中国物理快报,2010,27(11):59-61. |
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| 作者姓名： | 朱林繁 徐卫青 孙建敏 张文耀 |
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| 作者单位： | Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei 230026 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10734040, 10874168 and 10979040, the Knowledge Innovation Project of Chinese Academy of Sciences under Grant No KJCSl-YW-N30, and the National Basic Research Program of China under Grant No 2010CB923301. |
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| 摘 要： | The electron energy loss spectra for the valence-shell excitations of oxygen are measured at an incident electron energy of 2500 eV and at scattering angles from 4° to 8.5°. The dipole-forbidden and octupole-allowed transition of the A＇3Δu ←X3Σg- is observed from the measured spectra, and it is found that the peak profile of the A＇3Δu ←X3Σg^- excitation can be well represented by a Gaussin function. The energy position of 6.007±0.008 eV and Franck？Condon linewidth of 1.312±0.020 eV of the A＇3Δu ←X3Σg^-, which are independent of the scattering condition, have been determined for the first time. The peak profiles of the A＇3Δu ←X3Σg^- determined in this work provide a possibility to realize the spectral decomposition method of unfolding the Herzberg pseudocontinuum proposed by -ampbell ？t et al. Phys. Rev. A 61 （2000） 022706]
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| 关 键 词： | 电子能量 氧 光谱观测 分解方法 散射角 损失谱 价壳层 弗兰克 |
| 收稿时间： | 2010-6-17 |
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