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• PhysRevA.95.063408

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## Spin-dependent quantum theory of high-order above-threshold ionization

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• D. Zille
• D. Seipt
• M. Möller
• S. Fritzsche
• G. G. Paulus
• D. B. Milošević
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Article number 063408 12/06/2017 Physical review a 6 95 Published English

### Abstract

The strong-field-approximation theory of high-order above-threshold ionization of atoms is generalized to include the electron spin. The obtained rescattering amplitude consists of a direct and exchange part. On the examples of excited He atoms as well as ${\mathrm{Li}}^{+}$ and ${\mathrm{Be}}^{++}$ ions, it is shown that the interference of these two amplitudes leads to an observable difference between the photoelectron momentum distributions corresponding to different initial spin states: Pronounced minima appear for singlet states, which are absent for triplet states.