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High-Energy Two-Electron Photoabsorption as a Three-Body Problem

机译:高能两电子光吸收作为三体问题

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We study the high-energy behaviour of double photoionization and of the ionization accompanied by excitation of the states n~1S and n~3S of the H~-ion, helium atom, and light helium-like ions. We show that the high-energy nonrelativistic limit of the "ionization + excitation" to the single-ionization cross section ratio is still valid for the photon energies, corresponding to the relativistic energies of the outgoing electron. The same applies to the double photoionization of the triplet states. The situation for the double photoionization of singlet states differs due to the quasifree mechanism. All these ionization ratios are calculated by using the high-precision locally correct wave functions for the bound electrons. The importance of using locally correct functions is emphasized.
机译:我们研究了双重光电离和电离伴随着H〜离子,氦原子和轻氦样离子的n〜1S和n〜3S态激发的高能行为。我们表明,“电离+激发”对单电离横截面比率的高能非相对论极限对于光子能量仍然有效,这与输出电子的相对论能量相对应。这同样适用于三重态的双光电离。由于准自由机理,单重态双光电离的情况有所不同。所有这些电离率都是通过对结合的电子使用高精度的局部校正波函数来计算的。强调使用本地正确功能的重要性。

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