Studies of Absolute Differential Excitation Cross Section of Molecular Oyxgen by Electron Impact

电子撞击氧分子绝对差动激发截面的研究

• 批准号: 9205041
• 负责人: Tong-Wha Shyn
• 金额: $ 28.5万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-15 至 1996-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9205041&HistoricalAwards=false
• 关键词: Studies; Absolute; Differential; Excitation; Cross

This proposed research is a continuation of the previous investigations on excitation cross section measurement of molecular oxygen by electron impact for Pseudo-continuum region (4 - 7 eV energy loss) and an extensive data analysis of Schumann-Runge region ( 7 - 10 eV energy -loss). This experimental and theoretical joint research program will determine absolute electron impact cross sections for all the important electronic transitions of molecular oxygen in the 4 - 10 eV energy loss region. Differential cross sections of identifiabled electronic states and vibrational excitations of electronic states will be measured by a crossed-beam method over angles ranging from 12 to 160o with impact energies ranging from near threshold to 200 eV. From the observed electron impact process, the dissociation products will be identified by a detailed analysis of the combined photoabsorption and electron energy-loss data for the dissociation of O2 into ground and excited stated atomic fragments ( O(1D), O(1S)). These results will be analyzed by an extensive configuration interaction calculation, performed at Los Alamos National Laboratory in order to obtain potential energy curves and dipole electronic transition moments from the ground state to the excited states.

这项研究是前一项研究的延续。 分子激发截面测量研究 氧通过电子碰撞的伪连续区（4 - 7 eV 能量损失）和舒曼-龙格的大量数据分析 区域（7 - 10 eV能量损失）。 该实验和理论联合研究计划将 确定绝对电子碰撞截面的所有 分子氧在4 - 10中的重要电子跃迁 eV能量损失区。 微分截面 可识别的电子态和振动激发 电子状态将通过交叉束方法测量， 角度范围从12到160度，冲击能量范围从 接近阈值至200 eV。 从观察到的电子撞击 过程中，解离产物将通过详细的 光吸收和电子能量损失的联合分析 O2分解为基态和激发态的数据 原子碎片（O（1D），O（1 S））。 将对这些结果进行分析 通过广泛的组态相互作用计算，在 洛斯阿拉莫斯国家实验室为了获得势能 曲线和偶极电子跃迁矩 状态到激发态。