低能N^(6+)离子与Ne原子碰撞的单电子俘获研究

The State-selective Single Electron Capture of Low Energy N^(6+)Ions Colliding with Ne Atom

采用冷靶反冲离子动量谱仪技术,实验测量了能量为6和8.6 keV/u N^(6+)-Ne碰撞的单电子俘获过程,得到了主量子数n分辨的态选择截面和炮弹离子的散射角分布。实验结果表明,单电子主要被俘获到n=3和n=4的态。这与分子库仑过垒模型计算的反应窗所预测的结果符合。同时,实验获得了单电子俘获到n=3和n=4量子态的角微分截面,此结果与经典模型的计算结果存在较大差别,主要原因是碰撞反应过程的多通道耦合效应。

By using cold target recoil ion momentum spectroscopy, we performed the single electron capture experiment between N^(6+)ion and Ne atom with energies of 6 and 8.6 keV/u. The n--resolved state-selective capture crosssections and the scattering angular distributions were measured. The experimental results show the strong population of both n=3 and 4 states on the projectile, which is in good agreement with the results predicted by the reaction window calculated by the molecular coulomb over barrier model. However, the scattering angle distributions corresponding to capture to n=4 and 5 states, inconsistent with the interpretation of the classical model, the reason is mainly originated from the multi-channel coupling effect of the collision reaction process.