近Bohr速度129Xeq+离子入射Ta靶发射近红外光谱线

用动能一定的高电荷态¹²⁹Xe^q+(17≤q≤27)离子，分别入射洁净的Ta靶表面，测量中性化的激发态Xe原子从组态5p⁵(²P°_3/2) nl退激到组态5p⁵(²P°_3/2) ml’过程中辐射的近红外光谱线.实验结果表明:多激发态的空心原子退激发射其特征光谱线，部分典型的跃迁按照阶梯方式退激.Xe原子发射的谱线的单粒子荧光产额和激发的Ta原子发射谱线的单粒子荧光产额随入射离子电荷态的增加而增加，其增加的趋势与入射离子携带的势能随电荷态增加的趋势一致.证明在近Bohr速度的能区，经典过垒模型是成立的.

Atomic and ionic near infrared emsision spectra induced by the impact of 129 Xeq+ on Ta solid surface

The highly charged 129Xeq+(17≤q≤27) ions with certain kinetic energy are incident on the clean Ta target surface respectively, then the measurement of near-infrared spectral lines with wavelength from 800nm to 1700nm emitted from Xe hollow atoms and Ta atoms is reported. The experimental results show that the de-excited emission characteristic spectral lines of hollow atoms in multi-excited states, some typical transitions follow the ladder pattern, the single-particle fluorescence yield of the spectral lines emitted by Xe atoms and the single-particle fluorescence yield of the spectral lines emitted by excited Ta atoms increase with the increase of the charge state of the incident ions, and the increasing trend is consistent with the trend of the potential energy carried by the incident ions with the increase of the charge state. It is proved that in the energy region near Bohr velocity, The classical over-the-barrier model is valid.