D. Zille,
D. Seipt,
M. Möller,
S. Fritzsche,
G.G. Paulus,
and D. B. Milošević
Spin-dependent quantum theory of high-order above-threshold ionization
Phys. Rev. A, 95 :063408 (June 2017)
Spin-dependent quantum theory of high-order above-threshold ionization
Phys. Rev. A, 95 :063408 (June 2017)
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 Li^+ and Be^2+ 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.