Attosecond electron–spin dynamics in Xe 4d photoionization

Shiyang Zhong (), Jimmy Vinbladh, David Busto, Richard J. Squibb, Marcus Isinger, Lana Neoričić, Hugo Laurell, Robin Weissenbilder, Cord L. Arnold, Raimund Feifel, Jan Marcus Dahlström, Göran Wendin, Mathieu Gisselbrecht, Eva Lindroth and Anne L’Huillier
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Shiyang Zhong: Lund University
Jimmy Vinbladh: Stockholm University, AlbaNova University Center
David Busto: Lund University
Richard J. Squibb: University of Gothenburg
Marcus Isinger: Lund University
Lana Neoričić: Lund University
Hugo Laurell: Lund University
Robin Weissenbilder: Lund University
Cord L. Arnold: Lund University
Raimund Feifel: University of Gothenburg
Jan Marcus Dahlström: Lund University
Göran Wendin: Chalmers University of Technology
Mathieu Gisselbrecht: Lund University
Eva Lindroth: Stockholm University, AlbaNova University Center
Anne L’Huillier: Lund University

Nature Communications, 2020, vol. 11, issue 1, 1-6

Abstract: Abstract The photoionization of xenon atoms in the 70–100 eV range reveals several fascinating physical phenomena such as a giant resonance induced by the dynamic rearrangement of the electron cloud after photon absorption, an anomalous branching ratio between intermediate Xe+ states separated by the spin-orbit interaction and multiple Auger decay processes. These phenomena have been studied in the past, using in particular synchrotron radiation, but without access to real-time dynamics. Here, we study the dynamics of Xe 4d photoionization on its natural time scale combining attosecond interferometry and coincidence spectroscopy. A time-frequency analysis of the involved transitions allows us to identify two interfering ionization mechanisms: the broad giant dipole resonance with a fast decay time less than 50 as, and a narrow resonance at threshold induced by spin-flip transitions, with much longer decay times of several hundred as. Our results provide insight into the complex electron-spin dynamics of photo-induced phenomena.

Date: 2020
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DOI: 10.1038/s41467-020-18847-1

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