Single and double K-shell resonant photoionization and Auger decay of 1s -> 2p excited states of O+-O4+
Single and double K-shell resonant photoionization and Auger decay of 1s -> 2p excited states of O+-O4+
复制标题
O -O4 1s -> 2p 激发态的单和双 K 壳层共振光电离和俄歇衰变
DOI：
10.1051/0004-6361/201731110
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发表时间：
2017
影响因子：
6.5
通讯作者：
Yuan Jianmin
中科院分区：
文献类型：
--
作者：
Zeng Jiaolong;Li Yongjun;Liu Pengfei;Gao Cheng;Yuan Jianmin
本文从理论上研究了O~+-O~(4+)基态和第一激发态量子态在1s→2P共振附近的单、双光电离截面。用R-矩阵方法求出了单电离截面，而双电离截面是由直接双俄歇衰变与总俄歇衰变的分支比得到的。通过分析可能的双电离路径，我们得出结论：双光电离主要来源于K壳层共振态的直接双俄歇衰变。我们的理论工作诊断了最近一次实验中制备的量子态的布居分数，并成功地解释了单、双光电离截面上的实验观测。
In this work, single and double photoionization cross sections in the vicinity of 1s → 2p resonances are investigated theoretically for quantum states belonging to the ground and first excited configurations of O+–O4+. R-matrix method has been employed to obtain the single ionization cross section, whereas the double ionization cross sections are obtained by the branching ratios of the direct double Auger decay to the total Auger decay. By analyzing possible double ionization pathways, we conclude that the double photoionization originates predominately from the direct double Auger decay of the K-shell resonant states. Our theoretical work diagnosed the population fraction of the quantum state prepared in a recent experiment and successfully interpreted the experimental observations on both single and double photoionization cross sections.