| The dissociative ionization and Coulomb explosion of ethane by a femtosecond laser field |
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| 引用本文： | 李霞,任海振,马日,陈建新,杨宏,龚旗煌. The dissociative ionization and Coulomb explosion of ethane by a femtosecond laser field[J]. 中国物理, 2004, 13(9): 1564-1568. DOI: 10.1088/1009-1963/13/9/035 |
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| 作者姓名： | 李霞 任海振 马日 陈建新 杨宏 龚旗煌 |
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| 作者单位： | State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China |
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| 基金项目： | Project supported by the National Key Basic Research Special Foundation of China (Grant No TG1999075207), and the National Natural Science Foundation of China (Grant Nos 60378012, 10104003, 10328407 and 90101027). |
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| 摘 要： | Femtosecond laser-induced dissociation and Coulomb explosion of polyatomic molecule C_2H_6 were systematically investigated using a time-of-flight mass spectrometer and a chirped pulse amplifier laser. With the laser intensity varying from 2.4×10^{15}W/cm^{2} to 1.2×10^{16}W/cm^2, strong molecular ions C_2H_n^+ (n=0－6) and atomic ions C^{m+} (m=1－3) signals were observed. The double-peak structure of atomic ions indicated the occurrence of Coulomb explosion. Compared with the nearly isotropic distribution of C^{+}, highly charged ions C^{m+} (m=2－3) exhibited a sharply anisotropic angular distribution, which was attributed to the geometric alignment.
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| 关 键 词： | 电离场 多光子加工 飞秒激光器 乙烷 托马斯-费米-狄拉克模型 分子物理学 |
| 收稿时间： | 2004-01-09 |
The dissociative ionization and Coulomb explosion of ethane by a femtosecond laser field |
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| Li Xi,Ren Hai-Zhen,Ma Ri,Chen Jian-Xin,Yang Hong and Gong Qi-Huang. The dissociative ionization and Coulomb explosion of ethane by a femtosecond laser field[J]. Chinese Physics, 2004, 13(9): 1564-1568. DOI: 10.1088/1009-1963/13/9/035 |
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| Authors: | Li Xi Ren Hai-Zhen Ma Ri Chen Jian-Xin Yang Hong Gong Qi-Huang |
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| Affiliation: | State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China |
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| Abstract: | Femtosecond laser-induced dissociation and Coulomb explosion of polyatomic molecule C_2H_6 were systematically investigated using a time-of-flight mass spectrometer and a chirped pulse amplifier laser. With the laser intensity varying from 2.4×10^{15}W/cm^{2} to 1.2×10^{16}W/cm^2, strong molecular ions C_2H_n^+ (n=0－6) and atomic ions C^{m+} (m=1－3) signals were observed. The double-peak structure of atomic ions indicated the occurrence of Coulomb explosion. Compared with the nearly isotropic distribution of C^{+}, highly charged ions C^{m+} (m=2－3) exhibited a sharply anisotropic angular distribution, which was attributed to the geometric alignment. |
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| Keywords: | field ionization multiphoton processes mass spectra |
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