伴随中等光子能量激发的光电离
Photoionization accompanied by excitation at intermediate photon energies
摘要：
我们计算了氦原子和类氦离子在中间值的光子能量与激发光电离比的光电离。电子之间的末态相互作用包含在索末菲参数的最低阶中。这使我们能够，在纯粹的数值计算相比，调查的各种机制的作用，超出了高能量限制。用关联函数超球谐函数方法描述了两个束缚电子的系统。对于类氦离子的情况，我们提出了高能量极限作为核的负电荷的功率膨胀。我们分析了非零轨道动量的激发态的作用。
英文摘要：
We calculate the photoionization with excitation-to photoionization ratios for atomic helium and heliumlike ions at intermediate values of the photon energies. The final state interactions between the electrons are included in the lowest order of their Sommerfeld parameter. This enables us, in contrast to purely numerical calculations to investigate the roles of various mechanisms contributing beyond the high energy limit. The system of the two bound electrons is described by the functions obtained by the Correlation Function Hyperspherical Harmonic Method. For the case of heliumlike ions we present the high energy limits as power expansion in inverse charge of the nucleus. We analyse the role of excitation of states with the nonzero orbital momenta.
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