Ionic fragmentation of a CH 4 molecule induced by 10-keV electrons: Kinetic-energy-release distributions and dissociation mechanisms
Ionic fragmentation of a CH 4 molecule induced by 10-keV electrons: Kinetic-energy-release distributions and dissociation mechanisms
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DOI：
10.1103/physreva.87.062706
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发表时间：
2013-06
影响因子：
2.9
通讯作者：
R. Singh;P. Bhatt;N. Yadav;R. Shanker
中科院分区：
文献类型：
--
作者：
R. Singh;P. Bhatt;N. Yadav;R. Shanker
研究了10 keV电子轰击下CH4分子的离子碎裂动力学。反冲离子动量谱技术被用来获得有关的动能释放和解离所产生的不同途径的CH4阳离子的碎裂机制的信息。结果表明，CH42+分子离子完全库仑爆炸和不完全库仑爆炸共产生8条解离途径.这些途径的动能释放进行比较，从文献中的不同的带电粒子，光子，和它们的冲击能量的影响与早期的数据。结果表明，CH4 2+的低电子态主要参与了所观察到的解离通道.此外，与这些通道的解离机制的建议和讨论。此外，我们还估计了在所考虑的电子能量的影响下产生的CH 4阳离子的不同碎裂通道的相对离子强度。
The dynamics of ionic fragmentation of CH4 molecules under impact of 10-keV electrons has been studied. The technique of recoil ion momentum spectroscopy is employed to obtain information about the kinetic energy release and the dissociation mechanisms of different pathways arising from the fragmentation of a CH4 dication. The results show that there are altogether eight dissociation pathways that arise from the complete and the incomplete Coulomb explosions of the CH4 2+ molecular ions. The kinetic energy release for these pathways is compared with earlier data from the literature for the impact of different charged particles, photons, and their impact energies. The present results indicate that mostly the lower electronic states of CH4 2+ are involved for the observed dissociation channels. Also, the dissociation mechanisms associated with these channels are suggested and discussed. Further, we have also estimated the relative ion intensities of different channels of fragmentation of CH4 dication produced under impact of considered energy of electrons.