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Ionization and Dissociation of Methyl Bromide in Intense Laser Field
Yang Zheng1; Liu Hong-Tao1; Tang Zi-Chao2; Gao Zhen1
2010-02-10
Source PublicationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN0251-0790
Volume31Issue:2Pages:367-373
AbstractIonization-dissociation of methyl bromide in intense laser field was studied using home-built reflection time-of-flight mass spectrometer. Based on the relative high resolution of the RTOF-MS (M/Delta M > 2000), the Kinetic Energy Release (KER) of the fragment ions was measured. Multiphoton dissociation and Coulomb explosion mechanisms were used to explain the experimental results. Comparing with the result of methyl iodide in intense laser field, some differences are observed: (1) at the same laser field intensity, the highest charged fragment ion of methyl bromide was Br(3+), lower than I(6+) of methyl iodide; (2) the dehydrogenation channel was observed in the multiphoton dissociation or Coulomb explosion of methyl bromide, but was not observed in the case of methyl iodide; (3) HBr(+) was observed, but there was no similar channel in the case of methyl iodide; (4) for methyl bromide, the valid charge distance of Coulomb explosion increases with the product of p and q; while in the case of methyl iodide, the distance remained almost the same; (5) the producing channel of CH(m)(+) (m = 0, 1, 2) is different from the ionization-dissociation of methyl iodide in which the stepwise dissociation of CH(3)(+) was thought to be the main channel, CH(m)(+) (m = 0, 1, 2) of methyl bromide are mainly from the products of the direct dissociation of the dehydrogenated parent ions instead of the stepwise dissociation of CH(3)(+).
KeywordTime-of-flight Mass Spectrometry Intense Laser Field Coulomb Explosion Multiphoton Dissociation
Indexed BySCI
Language英语
WOS IDWOS:000275476600030
PublisherHIGHER EDUCATION 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/121111/69624
Collection中国科学院化学研究所
Corresponding AuthorGao Zhen
Affiliation1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Yang Zheng,Liu Hong-Tao,Tang Zi-Chao,et al. Ionization and Dissociation of Methyl Bromide in Intense Laser Field[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2010,31(2):367-373.
APA Yang Zheng,Liu Hong-Tao,Tang Zi-Chao,&Gao Zhen.(2010).Ionization and Dissociation of Methyl Bromide in Intense Laser Field.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,31(2),367-373.
MLA Yang Zheng,et al."Ionization and Dissociation of Methyl Bromide in Intense Laser Field".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 31.2(2010):367-373.
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