Cross section for single and double ionization of carbon dioxide by electron impact from threshold up to 180 eV
Cross section for single and double ionization of carbon dioxide by electron impact from threshold up to 180 eV
复制标题
通过电子冲击从阈值高达 180 eV 进行二氧化碳单电离和双电离的横截面
DOI：
--
复制
发表时间：
1978
期刊：
影响因子：
--
通讯作者：
E. Hille
中科院分区：
文献类型：
--
作者：
T. Märk;E. Hille
用双聚焦质谱仪瓦里安MAT CH5研究了高达180 eV电子能量对一氧化碳电子碰撞电离的影响。用分子喷流方法对Ar+截面进行归一化处理，得到了CO+e→CO++2E和CO+e→CO+3E过程的绝对部分电离截面函数。在CO++的情况下，与前人的结果一致，该离子以亚稳态存在，平均半衰期为6-15μS.利用n次方根外推，由低能截面函数得到了如下最小电离势：Co+(X 2Σ+)=(14.0 7±0.0 5)eV和CO++=(41.8±0.5)eV。给出的所有实验结果都与以前的测定结果进行了比较。
Electron impact ionization of carbon monoxide has been studied as a function of electron energy up to 180 eV with a double focusing mass spectrometer Varian MAT CH5. Absolute partial ionization cross section functions have been obtained for the processes CO +e→CO++2e and CO+e→CO+++3e by normalization against the Ar+ cross section with help of the method of molecular effusive flow. In the case of CO++ the results suggest, in accordance with previous authors, that this ion exists in a metastable state with a mean half‐life in the range of 6–15 μs. Using nth root extrapolation, the following minimum ionization potentials have been derived from the low energy cross section function: CO+(X 2Σ+) = (14.07±0.05) eV and CO++= (41.8±0.5) eV. All experimental results presented are compared with previous determinations where available.