| 纳秒激光诱导C60分子碎裂中轻碎片离子C+n(n＜30)的产生机理研究 |
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| 引用本文： | 钱东斌,马新文,张大成,祖凯玲,刘惠萍,汶伟强.纳秒激光诱导C60分子碎裂中轻碎片离子C+n(n＜30)的产生机理研究[J].物理学报,2008,57(9):5810-5816. |
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| 作者姓名： | 钱东斌 马新文 张大成 祖凯玲 刘惠萍 汶伟强 |
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| 作者单位： | (1)中国科学院近代物理研究所，兰州 730000; (2)中国科学院近代物理研究所，兰州 730000；中国科学院研究生院，北京 100049 |
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| 基金项目： | 国家自然科学基金(批准号：10605034)和国家自然科学基金重点项目(批准号：10434100)资助的课题. |
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| 摘 要： | 采用飞行时间质谱计测量了纳秒激光诱导C60分子碎裂中轻碎片离子C+n(n≤11)的初始平均动能，结果显示轻碎片离子具有相同的初始平均动能(约为0.34eV)，并且该动能在一定范围内不随激光通量的变化而明显改变.结合前人的实验结果，对纳秒激光诱导C60分子碎裂中轻碎片离子C+n(n＜30)的主要产生模式作了新的阐述，即C<
关键词：
飞行时间质谱计
轻碎片离子
笼形结构塌陷
初始动能
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| 关 键 词： | 飞行时间质谱计 轻碎片离子 笼形结构塌陷 初始动能 |
| 收稿时间： | 2007-11-29 |
Formation mechanisms of small fragment ions in nanosecond laser induced fragmentation of C60 |
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| Qian Dong-Bin,Ma Xin-Wen,Zhang Da-Cheng,Zu Kai-Ling,Liu Hui-Ping and Wen Wei-Qiang.Formation mechanisms of small fragment ions in nanosecond laser induced fragmentation of C60[J].Acta Physica Sinica,2008,57(9):5810-5816. |
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| Authors: | Qian Dong-Bin Ma Xin-Wen Zhang Da-Cheng Zu Kai-Ling Liu Hui-Ping and Wen Wei-Qiang |
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| Abstract: | The time of flight mass spectrometric technique was used to determine the initial mean kinetic energy of small fragment ions C+n (n≤11) produced from C60 excited by 532nm nanosecond laser pulses. The measured kinetic energy shows little variation with the fragment mass and the laser fluence in a broad range. Based on the assumption that C+30 is produced predominantly by a single electron emission followed by successive C2 evaporation from hot C60 in the nanosecond laser field，the formation of small fragments is interpreted as the complete breakup of the unstable C+30 cage structure. The interpretation is consistent with the previously observed results. |
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| Keywords: | TOFMS small fragment ion cage structure breakup initial kinetic energy |
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