Charge transfer and collision‐induced dissociation reactions of CO++ with the rare gases at Elab=49 eV
Charge transfer and collision‐induced dissociation reactions of CO++ with the rare gases at Elab=49 eV
复制标题
Elab=49 eV 时 CO++ 与稀有气体的电荷转移和碰撞诱导解离反应
DOI：
10.1063/1.464673
复制
发表时间：
1993
影响因子：
4.4
通讯作者：
S. Leone
中科院分区：
文献类型：
--
作者：
S. Rogers;S. Price;S. Leone
在 Elab=49±1 eV 下，观察到 13CO++ 与每种稀有气体 (Rg) 反应的多个产物通道。 13CO++ 束是通过电子碰撞电离产生的，并使用四极质谱仪进行质量选择。离子束聚焦到碰撞区域，并使用飞行时间质谱法监测反应产物。直接测量 13C+、O+ 和 13CO+ 生产的相对产量。通过将 Rg+ 产生与双电荷稀有气体离子与中性稀有气体原子的电荷转移反应进行比较，估算 13CO++ 与 He、Ne、Ar 和 Kr 碰撞的绝对电荷转移反应截面。发现横截面范围为 13CO++ 与 He 碰撞的 0.9−0.9+1.5 A2 到与 Kr 碰撞的 37.5±19.6 A2。 13CO++ 与 He 的反应几乎完全进入碰撞诱导解离通道。对于与 N 的反应，碰撞诱导解离的分支分数较小......
Multiple product channels are observed for the reaction of 13CO++ with each of the rare gases (Rg) at Elab=49±1 eV. A beam of 13CO++ is produced by electron impact ionization and is mass selected using a quadrupole mass spectrometer. The ion beam is focused into a collision region and the reaction products are monitored using time‐of‐flight mass spectrometry. Relative yields for the production of 13C+, O+, and 13CO+ are measured directly. Absolute charge transfer reaction cross sections for collisions of 13CO++ with He, Ne, Ar, and Kr are estimated by comparing the Rg+ production with that for the charge transfer reactions of doubly charged rare gas ions with neutral rare gas atoms. The cross sections are found to range from 0.9−0.9+1.5 A2 for collisions of 13CO++ with He to 37.5±19.6 A2 for collisions with Kr. The reaction of 13CO++ with He proceeds almost exclusively into the collision‐induced dissociation channel. The branching fraction for collision‐induced dissociation is smaller for reactions with N...