Autoionizing hole states with electron configuration nsnp⁵ mp are studied in Ar⁺ and Kr⁺. Total and partial photoionization cross sections, photoelectron spectra and photoelectron angular distributions in the region of the resonances are obtained theoretically in extensive R-matrix calculations. The states of Ar⁺ are observed by means of excitation by a free-electron laser operating in the vacuum- and extreme-ultraviolet wavelength regime combined with angle-resolved photoelectron spectroscopy. Fine tuning of the photon energy allows scanning of the resonances and the observation of the shape of the partial cross section ratio, as well as the asymmetry parameter of the angular distribution of the photoelectrons. The calculations are in good agreement with the experimental data.

与电子组态自电离空穴态Ñ小号Ñ p ⁵ 米p的研究，在Ar ⁺和氪⁺。理论上，通过大量的R-矩阵计算可以获得共振区域内的全部和部分光电离截面，光电子能谱和光电子角分布。Ar ⁺的状态通过在真空和极紫外波长范围内工作的自由电子激光与角度分辨光电子能谱结合进行激发，可以观察到这些原子。光子能量的微调允许扫描共振并观察部分截面比率的形状，以及光电子角度分布的不对称参数。计算结果与实验数据吻合良好。