Branching ratios for the fragmentation pathways leading to C2H2+ in electron-ethylene collisions

被引：3

作者：

Sigaud, L. ^{[1
]}

Montenegro, E. C. ^{[2
]}

机构：

[1] Univ Fed Fluminense, Inst Fis, BR-24210346 Niteroi, RJ, Brazil

[2] Univ Fed Rio de Janeiro, Inst Fis, PO 68528, BR-21941972 Rio De Janeiro, RJ, Brazil

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2017年 / 50卷 / 10期

关键词：

TOF spectrometry; DETOF; Molecular fragmentation; Fragmentation pathways; Ethylene; Electron impact; CROSS-SECTIONS; IMPACT IONIZATION; DYNAMICS; ENERGY; ION; DISSOCIATION; SPECTRUM; METHANE; ETHANE;

D O I：

10.1088/1361-6455/aa6bb7

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The production of C2H3+ and C2H2+. in the fragmentation of ethylene (C2H4) by electron impact, in the 25-800 eV energy range, is investigated using the DETOF technique. The kinetic energy distributions of both species are obtained and the disentanglement of the two different fragmentation pathways leading to the production of C2H2+, namely (1) C2H4+ -> C2H2+ + H-2 and (2) C2H+ -> C2H2+ + 2H, was performed, providing the absolute cross sections for each channel. It is shown that the branching ratios are independent of the projectile velocity for impact energies above 100 eV, amounting to 80% for channel (1) and 20% for channel (2).

引用

页数：5

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