Analysis of Recoil Ion Momentum in Ne(e，2e)Ne + Reaction

Abstract

利用冷靶反冲离子动量谱仪，对电子轰击Ne原子的单电离反应(e，2e)进行了研究，实验测量了70—3300 eV入射能量情况下，反应过程中产生的一价反冲离子的动量分布，并对反冲离子的总动量进行了还原。介绍了一个简单的碰撞机制， 据此着重分析了反冲离子纵向动量和横向动量二维谱形成的原因，该碰撞机制能够较好地解释较高能量入射时的实验结果。 最后根据反冲离子的动量，估算了出射电子的能量范围， 为下一步进行电子、离子的符合测量奠定了基础。 Using cold target recoilion momentum spectroscopy(COLTRIMS) we have measured the momenta of recoil target ions in the single ionization(e， 2e) reactions of Ne at the energies between 70 and 3300 eV. A simple collision mechanism was introduced to analyze the distributions of the momenta of recoil ions. This mechanism can qualitatively well explain the distributions for the intermediate and high impact energy. Finally，the energy range of the ionized electron according to the momenta of the ion was estimated，which lays the foundation for the next coincidence measurement of electrons and ions.