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题名: Population Rate Equation Analysis of Controllability of Fragmentation Process in Multiphoton ionization Experiments of Polyatomic Molecules
作者: Li Haiyang1;  Bai Jiling1
关键词: Population rate equation ;  Multiphoton ionization ;  Mass spectrum ;  Fragmentation ;  Furan
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 1995
DOI: 10.3866/PKU.WHXB19950203
卷: 11, 期:2, 页:107-112
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: On the basis of population rate equation of multiphoton ionization and fragmentation processes, the controllability of fragmentation process in MPI experiments of polyatomic molecules is analyzed in this paper. Curves of ionization efficiency and mean energy < E > of ions versus laser intensity were calculated for different ionization schemes. From the calculation results, we find that only 1+1 ionization scheme, soft ionization and hard fragmentation can be controlled by changing the intensity of ionization laser. For 3+1 ionization scheme, due to additional absorption photons after ionization, the ions have already obtained internal energy about 20 similar to 30eV/per ion even at single ion detection limit. This amount of energy far exceeds the dissociation threshold of the parent ion, so the parent ions formed by ionization can completely dissociate to daughters in the same laser pules. Our analyses can explain why parent ions didn't appear in MPI mass spectra of furan molecule at 450 nm.
语种: 英语
WOS记录号: WOS:000207590100003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139435
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Li Haiyang,Bai Jiling. Population Rate Equation Analysis of Controllability of Fragmentation Process in Multiphoton ionization Experiments of Polyatomic Molecules[J]. ACTA PHYSICO-CHIMICA SINICA,1995,11(2):107-112.
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