Cross sections for the CH2+ formation pathways via CH4 fragmentation by electron impact

29th International Conference on Photonic, Electronic, and Atomic Collisions

Sigaud, L.^1 ; Montenegro, E.C.^2

Instituto de Física, Universidade Federal Fluminense, Niterói, RJ

24210-346, Brazil^1

Instituto de Física, Universidade Federal Do Rio de Janeiro, Rio de Janeiro

21941-972, RJ, Brazil^2

关键词: Absolute cross sections;    Electron impact;    Energy ranges;    Formation pathways;    Kinetic energy distributions;    Kinetic energy release;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/7/072014/pdf
DOI  :  10.1088/1742-6596/635/7/072014

来源: IOP

【 摘 要 】

The mechanisms for CH2+production, due to methane fragmentation by electron impact in the 22 to 400 eV energy range, were investigated using the DETOF technique. Absolute cross sections for the two possible channels, CH4+→ CH2++ H2and CH4+→ CH2++ 2H, and the corresponding kinetic energy distributions of CH2+were obtained. Furthermore, the average kinetic energy release of H2and H neutrals for these two reactions were estimated as 0.04 eV and 2.1 eV, respectively. The dynamics governing these two pathways is discussed.