Dissociation of methane in intense femtosecond laser field
文献类型：期刊论文
| 作者 | Tang, XP; Wang, SF; Gao, LR; Wang, C; Kong, FA |
| 刊名 | ACTA PHYSICO-CHIMICA SINICA
 |
| 出版日期 | 2003-07-01 |
| 卷号 | 19期号:7页码:661-665 |
| 关键词 | Femtosecond Laser Intense Laser Field Methane Tof-ms Dissociation |
| ISSN号 | 1000-6818 |
| DOI | 10.3866/PKU.WHXB20030720 |
| 英文摘要 | Methane molecules were irradiated by a laser beam in the intensity range of 7.6 x 10(13) similar to 1.4 x 10(14) W.cm(-2) (800 nm, 160 fs). A time of flight mass spectrometer was coupled to the laser system. The parent ions can be seen at low laser intensity of 7.6 x 10(13) W.cm(-2). When the laser intensity increases to 8.0 x 10(13) W.cm(-2), CH3+ ions appear. The appearance of the CH2+, CH+, C+ ions are at the laser intensities of 1.0 X 10(14) W.cm(-2), 1.4 x 10(14) W.cm(-2) and 1.4 X 10(14) W.cm(-2), respectively. The facts show that dissociation of methane is a step-wise process. Coulomb explosion does not happen during the dissociation because no multi-electron ions are found in the mass spectra. Only H+ ion yield has anisotropic angular distribution when methane is irradiated by a linearly polarized laser. This fact implies that the chemical bonds in the molecule are pulled off by the laser field and that the H+ ion flies along the direction of the laser electronic field. The quasi-diatomic molecule model we proposed can explain the experimental results satisfactorily. |
| 语种 | 英语 |
| WOS记录号 | WOS:000184412100020 |
| 出版者 | PEKING UNIV PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/80295]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Kong, FA |
| 作者单位 | Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, XP,Wang, SF,Gao, LR,et al. Dissociation of methane in intense femtosecond laser field[J]. ACTA PHYSICO-CHIMICA SINICA,2003,19(7):661-665. |
| APA | Tang, XP,Wang, SF,Gao, LR,Wang, C,&Kong, FA.(2003).Dissociation of methane in intense femtosecond laser field.ACTA PHYSICO-CHIMICA SINICA,19(7),661-665. |
| MLA | Tang, XP,et al."Dissociation of methane in intense femtosecond laser field".ACTA PHYSICO-CHIMICA SINICA 19.7(2003):661-665. |
入库方式： OAI收割
来源：化学研究所
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