Double-K-vacancy states in electron-impact single ionization of metastable two-electron N5+(1s2s 3S1) ions
Double-K-vacancy states in electron-impact single ionization of metastable two-electron N5+(1s2s 3S1) ions
复制标题
亚稳态二电子 N5 (1s2s 3S1) 离子电子碰撞单电离中的双 K 空位态
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
I. Bray
中科院分区：
文献类型：
--
作者：
A. Mϋller;A. Borovik;K. Huber;S. Schippers;D. Fursa;I. Bray
介质态在类氦亚稳态电子碰撞电离(1s2s{phantom{1s2s{phantom{
对Lue{0.16em}{0ex}}^{3}{S}_{1})$离子进行了详细的研究。采用了交叉光束装置和合适的实验技术来测量精确的绝对截面和精确的能量扫描数据。观察到了这种两电子离子在能量尺度上的不确定度小于0.5 eV的$K$壳层激发和相关共振产生的精细结构。精细的细节可以被揭示，例如直接电离和激发的反应路径与入射电子的捕获以及随后的双俄歇衰变的干扰。基于聚合密耦合(CCC)方法的从头计算与实验符合得很好。
The role of hollow states intermediately produced in electron-impact ionization of metastable He-like $N{}^{5+}(1s2s{phantom{
ule{0.16em}{0ex}}}^{3}{S}_{1})$ ions has been investigated in detail. A crossed-beam setup and suitable experimental techniques were employed for the measurement of accurate absolute cross sections and precise energy-scan data. Fine structures arising from $K$-shell excitations and associated resonances have been observed for this two-electron ion with less than $ifmmodepmelse extpmfi{}$0.5 eV uncertainty on the energy scale. Fine details, such as interference of the reaction pathways of direct ionization and excitation with capture of the incident electron followed by double-Auger decay, could be revealed. Ab initio calculations based on the convergent close coupling (CCC) approach are in good agreement with the experiment.