快O $^{8+}$离子碰撞锂中$K$壳层空位产生的双微分截面计算
Doubly-differential cross section calculations for $K$-shell vacancy production in lithium by fast O$^{8+}$ ion impact
摘要：
本文从理论上研究了1.5MeV/amu的O $^{8+}$ -Li碰撞体系中内壳层空位的产生。该理论结合了系统中每个电子的单电子振幅，以提取有关碰撞过程的多电子信息。然后将以这种方式获得的双微分截面与LaForge等人[J.Phys.B46，031001（2013）]的最新实验数据进行比较，产生良好的相似性，特别是对于低出射电子能量。仔细分析有助于内壳层空位产生的过程表明，与单活性电子计算相比，结果的改善可以归因于双电子激发电离过程的主导作用。
英文摘要：
Inner-shell vacancy production for the O$^{8+}$-Li collision system at 1.5 MeV/amu is studied theoretically. The theory combines single-electron amplitudes for each electron in the system to extract multielectron information about the collision process. Doubly-differential cross sections obtained in this way are then compared with the recent experimental data by LaForge et al. [J. Phys. B 46, 031001 (2013)] yielding good resemblance, especially for low outgoing electron energy. A careful analysis of the processes that contribute to inner-shell vacancy production shows that the improvement of the results as compared to single-active-electron calculations can be attributed to the leading role of two-electron excitation-ionization processes.
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