Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 26: Poster Session II
A 26.18: Poster
Wednesday, March 8, 2017, 17:00–19:00, P OG1
Spin-dependent rescattering in strong-field ionization of Helium — •Danilo Zille1,2, Daniel Seipt3,4, Max Möller1,2, Stephan Fritzsche2,3, Stefanie Gräfe5,6, Carsten Müller7, and Gerhard G. Paulus1,2 — 1Institute of Optics and Quantum Electronics, Friedrich Schiller University Jena, 07743 Jena, Germany — 2Helmholtz Institut Jena, 07743 Jena, Germany — 3Theoretisch-Physikalisches Institut, Friedrich Schiller University Jena, 07743 Jena, Germany — 4Physics Department, Lancaster University, Lancaster LA1 4YB, United Kingdom — 5Institute for Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany — 6Abbe Center of Photonics, Friedrich Schiller University Jena, 07743 Jena, Germany — 7Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
We investigate the influence of singlet and triplet spin states on rescattered photoelectrons in strong-field ionization of excited helium. Choosing either a symmetric or antisymmetric spatial wave function as the initial state results in different scattering cross sections for the 1s2s 1S and 3S states. These cross sections are used in the semi-classical model of strong-field ionization. Our investigations show that the photoelectron momentum distributions of rescattered electrons exhibit a significant dependence on the relative spin state of the projectile and the bound electron which should be observable in experiments. The proposed experimental approach can be understood as a testbed for probing the spin dynamics of electrons during strong-field ionization and the presented results as a baseline for their identification.