Photon Science Institute, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
J Chem Phys. 2012 Mar 7;136(9):094302. doi: 10.1063/1.3690461.
Low energy experimental and theoretical triple differential cross sections for the highest occupied molecular orbital of methane (1t(2)) and for the 2p atomic orbital of neon are presented and compared. These targets are iso-electronic, each containing 10 electrons and the chosen orbital within each target has p-electron character. Observation of the differences and similarities of the cross sections for these two species hence gives insight into the different scattering mechanisms occurring for atomic and molecular targets. The experiments used perpendicular, symmetric kinematics with outgoing electron energies between 1.5 eV and 30 eV for CH(4) and 2.5 eV and 25 eV for neon. The experimental data from these targets are compared with theoretical predictions using a distorted-wave Born approximation. Reasonably good agreement is seen between the experiment and theory for neon while mixed results are observed for CH(4). This is most likely due to approximations of the target orientation made within the model.
低能量实验和理论三重微分截面为甲烷的最高占据分子轨道（1t（2））和氖的 2p 原子轨道进行了比较。这些靶标是等电子的，每个靶标含有 10 个电子，并且每个靶标中的所选轨道具有 p 电子特性。观察这两种物质的截面的差异和相似性，从而深入了解原子和分子靶标中发生的不同散射机制。实验采用垂直对称运动学，出射电子能量为 1.5 eV 至 30 eV 用于 CH（4）和 2.5 eV 至 25 eV 用于氖。这些目标的实验数据与使用扭曲波 Born 近似的理论预测进行了比较。在氖中，实验与理论之间的一致性相当好，而在 CH（4）中则观察到混合结果。这很可能是由于模型中对目标取向的近似所致。
