Excitation of the CO Fourth Positive Band System by Electron Impact on Carbon Monoxide and Carbon Dioxide
Excitation of the CO Fourth Positive Band System by Electron Impact on Carbon Monoxide and Carbon Dioxide
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电子撞击一氧化碳和二氧化碳激发 CO 第四正带系统
DOI：
10.1063/1.1675223
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发表时间：
1971
影响因子：
4.4
通讯作者：
E. C. Zipf
中科院分区：
文献类型：
--
作者：
M. Mumma;E. Stone;E. C. Zipf
测量了CO(A1Π-X1Σ+)第四正带体系五个振动带的绝对激发截面。电子与CO和CO2的碰撞产生了能带，并测量了阈值到350 eV的截面。用28个谱带的相对强度测量来确定Re与r质心的关系，即Re = 1.9(1.0 − 0.6rυ‘υ“)。使用这种函数形式计算了绝对跃迁几率，并将υ‘ = 2能级的总跃迁几率归一化为已发表的实验结果。那么，此过渡的总f值为0.15。利用测量的特定谱带截面和绝对跃迁几率，确定了每个母体气体A1-υ‘ = 态的前五个振动能级( → ，0，Π，4)的绝对激发截面。当CO为母气时，这些振动能级的相对布居数与弗兰克-康登因子Qυ‘0成正比。十字之和S……
Absolute excitation cross sections were measured for five vibrational bands of the CO(A 1Π–X 1Σ+) Fourth Positive band system. The bands were produced by electron impact on CO and CO2 and the cross sections were measured from threshold to 350 eV. Relative intensity measurements on 28 bands were used to determine the dependence of Re on the r centroid, which is Re = 1.9(1.0 − 0.6rυ′υ″). Absolute transition probabilities were computed using this functional form for Re and normalizing the total transition probability of the υ′ = 2 level to published experimental results. The total f‐value for this transition is then 0.15. Absolute excitation cross sections for the first five vibrational levels (υ′ = 0 → 4) of the A 1Π state were determined for each parent gas using the measured cross sections of specific bands and the absolute transition probabilities. When CO was the parent gas, the relative populations of these vibrational levels were proportional to the Franck–Condon factors, qυ′0. The sum of the cross s...