Angular Streaking of Auger-Meitner Electrons from Partially Coherent Photoions

POSTER

Abstract

Ultrafast x-ray pulses can ionize molecules into partially entangled pairs of photoelectrons and core-excited ions, especially when the electron wavepackets from different continua overlap. The subsequent Auger-Meitner (AM) emission from the partially coherent cation is investigated with the angular streaking technique. An additional circularly polarized infrared laser pulse allows us to measure the temporal profile of the AM decay which characterizes the coherence of the intermediate cation. We present a model for angular streaking of this AM decay, where different intermediate electron/photoion pairs interfere in the same final dication state. Within the strong field approximation, a two-continuum model is employed and the resulting modulation of the AM current is shown. Correlation between the photo- and AM electrons is manifested by modeling of the two-electron joint momentum distribution. This provides a framework for the description of probing coherent electronic properties in molecules using angular streaking.

*This work was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), Chemical Sciences, Geosciences, and Biosciences Division. Use of the Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, is supported by the U.S. DOE, Office of Science, Office of BES under Contract No. DE-AC02-76SF00515.

Presenters

  • Jun Wang

    • Stanford University
    • Stanford University, Menlo Park, CA, USA

Authors

  • Jun Wang

    • Stanford University
    • Stanford University, Menlo Park, CA, USA

  • Philip H Bucksbaum

    • Stanford Univ
    • Stanford University

  • Taran Driver

    • SLAC
    • Stanford PULSE Institute, Menlo Park, CA, USA
    • SLAC National Accelerator Laboratory

  • Agostino Marinelli

    • SLAC National Laboratory
    • SLAC
    • SLAC National Accelerator Laboratory

  • James P Cryan

    • SLAC National Accelerator Laboratory
    • Stanford PULSE Institute, Menlo Park, CA, USA