ICCAS OpenIR
Dissociation of methanol in intense femtosecond laser field
Tang, XP; Gao, LR; Wang, YL; Wang, C; Wang, SF; Kong, FA
2002-12-01
Source PublicationCHINESE SCIENCE BULLETIN
ISSN1001-6538
Volume47Issue:23Pages:1973-1978
AbstractMethanol was irradiated by 80 fs laser pulse, intensity range of 10(13)-10(1)4 W/cm(2). A TOF-mass spectrometer was coupled to the laser system and used to detect the ions produced. The parent ions CH3OH+ appeared firstly at the laser intensity of 1.4 X 10(13) W/cm(2). While the laser intensity was,,gradually increased, the parent ions were dissociated and the primary ions CH2OH+ were given as verified from the irradiation of deuterated methanol (CH3OD)) showing the C-H bond cracking firstly. While the laser intensity was further. increased to 2.0 X 10(13) W/cm(2), the C-O bonds of the parent ions also broke to give CH3+. When the laser intensity was higher, smaller fragment ions like CH+, C+ OH+ and O+ also appeared. Among the fragment ions, only H+ ion yield had anisotropic angular distribution dependence on the laser polarization vector in the dissociation of methanol. All the experimental observations show that the dissociation of methanol proceeds through stepwise mechanism but not Coulomb explosion.
KeywordIntense Laser Field Femtosecond Laser Dissociation Methanol Tof-mass Spectra
Indexed BySCI
Language英语
WOS IDWOS:000179588600007
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79316
Collection中国科学院化学研究所
Corresponding AuthorKong, FA
AffiliationChinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Tang, XP,Gao, LR,Wang, YL,et al. Dissociation of methanol in intense femtosecond laser field[J]. CHINESE SCIENCE BULLETIN,2002,47(23):1973-1978.
APA Tang, XP,Gao, LR,Wang, YL,Wang, C,Wang, SF,&Kong, FA.(2002).Dissociation of methanol in intense femtosecond laser field.CHINESE SCIENCE BULLETIN,47(23),1973-1978.
MLA Tang, XP,et al."Dissociation of methanol in intense femtosecond laser field".CHINESE SCIENCE BULLETIN 47.23(2002):1973-1978.
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