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

本研究是对赝连续区（4 - 7 eV能量损失）电子冲击测量分子氧激发截面的研究和舒曼-龙格区（7 - 10 eV能量损失）的广泛数据分析的延续。这个实验和理论联合研究计划将确定分子氧在4 - 10 eV能量损失区内所有重要电子跃迁的绝对电子冲击截面。可识别电子态的微分截面和电子态的振动激发将用交叉光束法测量，角度范围从12到160，冲击能量范围从接近阈值到200 eV。从观察到的电子冲击过程中，将通过详细分析O2解离成接地和激发态原子碎片(O（1D)， O(1S)）的光吸收和电子能量损失数据来识别解离产物。这些结果将通过在洛斯阿拉莫斯国家实验室进行的广泛的组态相互作用计算来分析，以获得从基态到激发态的势能曲线和偶极电子跃迁矩。

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.