Contribution of vibrational excitation to the rate of carbon dioxide dissociation in electrical discharges
Contribution of vibrational excitation to the rate of carbon dioxide dissociation in electrical discharges
复制标题
振动激励对放电中二氧化碳解离速率的贡献
DOI：
10.1021/j100549a024
复制
发表时间：
1976
期刊：
影响因子：
--
通讯作者：
E. Molinari
中科院分区：
文献类型：
--
作者：
P. Capezzuto;F. Cramarossa;R. D'agostino;E. Molinari
二氧化碳的解离速率已被测量在1-10卡cm-3 s_1，5-40托，和气体流量在0.1和17 1之间的射频放电操作。(STP)min””1。实验结果与由电子能量分布函数和激发截面计算的结果进行了比较。有证据表明，涉及振动激发分子的解离机制对所观察到的速率作出了重大贡献，并在压力高于^ 20 Torr时成为主导机制。在40托下，高达60%的泵入CO2振动系统的能量用于解离。
Rates of dissociation of carbon dioxide have been measured in radio-frequency discharges operated at 1-10 cal cm-3 s_1, 5-40 Torr, and gas flow rates between 0.1 and 17 1.(STP) min"" 1. A comparison has been made of the experimental rate constants with those calculated from electron energy distribution functions and the excitation cross section with thresholdat 7 eV. Evidence is presented that a mechanism of disso-ciation involving vibrationally excited moleculesmakes a significant contribution to the observed rates and become the dominant one at pressures above^ 20 Torr. At 40 Torr up to 60% of the energy pumped into the vibrational system of CO2 is utilized for dissociation.