| 纳秒强光场下碘甲烷的激光电离中高价离子产生研究 |
| |
| 引用本文： | 孔祥蕾,牛冬梅,张先燚,罗晓琳,张树东,阚瑞峰,李海洋.纳秒强光场下碘甲烷的激光电离中高价离子产生研究[J].原子与分子物理学报,2003,20(4):441-445. |
| |
| 作者姓名： | 孔祥蕾 牛冬梅 张先燚 罗晓琳 张树东 阚瑞峰 李海洋 |
| |
| 作者单位： | 中国科学院安徽光学精密机械研究所环境光谱学实验室,合肥,230031 |
| |
| 基金项目： | 国家自然科学基金资助课题(批准号:20073042) |
| |
| 摘 要： | 利用25纳秒脉冲Nd-YAG 532 nm的激光,在1011 W cm-2的光场强度下,用飞行时间质谱对不同载气条件下碘甲烷的激光电离过程进行了研究.当利用氩作为载气时,除观察到H+,C+,CH+,CH+3,I+,CH3I+等离子外,还观察到很强的C2+,I2+和I3+离子信号.这些高价离子的最可几平动能分别为55.5 eV,9.5 eV和27 eV.质谱峰形的分裂现象以及不同载气的实验结果表明这些高价离子可能来源于碘甲烷团簇的库仑爆炸过程.
|
| 关 键 词： | 碘甲烷 纳秒激光 高价离子 库仑爆炸 |
| 文章编号： | 1000-0364(2003)04-0441-05 |
| 收稿时间： | 2003/4/25 |
| 修稿时间： | 2003年4月25日 |
Generation of multi-charge ions in laser-induced ionization of methyl iodide under intense nanosecond laser fields |
| |
| KONG Xiang-lei,NIU Dong-mei,ZHANG Xian-yi,ZHANG Shu-dong,KAI Rui-feng,LI Hai-yang.Generation of multi-charge ions in laser-induced ionization of methyl iodide under intense nanosecond laser fields[J].Journal of Atomic and Molecular Physics,2003,20(4):441-445. |
| |
| Authors: | KONG Xiang-lei NIU Dong-mei ZHANG Xian-yi ZHANG Shu-dong KAI Rui-feng LI Hai-yang |
| |
| Abstract: | The photoionization of methyl iodide seeded in He, N_2, Ar gases by a intense 25 ns Nd-YAG 532 nm laser has been studied by time-of-flight mass spectrometry. At the laser intensity about 10~(10)～10~(11) W cm~(-2). multi-charged ions C~(2+), I~(2+) and I~(3+) appeared in the mass spectra when Ar or He was used as carrier gas. From the peak splitting, the most probable kinetic energies of C~(2+), I~(3+) and I~(3+) are calculated to be 55.5 eV, 9.5 eV and 27 eV respectively. From the results under different conditions, it is proposed that the multi-charge ions are come from the coulomb explosion of methyl iodide cluster ions. |
| |
| Keywords: | Methyl iodide Nanosecond laser Multi-charge ions Coulomb explosion |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《原子与分子物理学报》浏览原始摘要信息 |
| 点击此处可从《原子与分子物理学报》下载免费的PDF全文 |
|
