Quantum-beat photoelectron-imaging spectroscopy of Xe in the VUV

Ruaridh Forbes, Varun Makhija, Jonathan G. Underwood, Albert Stolow, Iain Wilkinson, Paul Hockett, and Rune Lausten
Phys. Rev. A 97, 063417 – Published 22 June 2018

Abstract

Time-resolved pump-probe measurements of Xe, pumped at 133 nm and probed at 266 nm, are presented. The pump pulse prepared a long-lived hyperfine wave packet in the Xe 5p5(P1/22)6s2[1/2]1 manifold (E=77185cm1=9.57eV). The wave packet was monitored via single-photon ionization and velocity map photoelectron images were measured. The images provide angle- and time-resolved data which, when obtained over a large time window (900 ps), constitute a precision quantum-beat spectroscopy measurement of the hyperfine state splittings. Additionally, analysis of the full photoelectron image stack provides a quantum-beat imaging modality, in which the Fourier components of the photoelectron images correlated with specific beat components can be obtained. This may also permit the extraction of isotope-resolved photoelectron images in the frequency domain, in cases where nuclear spins (hence beat components) can be uniquely assigned to specific isotopes (as herein), and also provides phase information relating to the ionization dynamics. The information content of both raw and inverted image stacks is investigated, suggesting the utility of the Fourier analysis methodology in cases where images cannot be inverted.

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  • Received 2 March 2018

DOI:https://doi.org/10.1103/PhysRevA.97.063417

©2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Ruaridh Forbes

  • Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario, Canada K1N 6N5 and Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, England, United Kingdom

Varun Makhija*

  • Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario, Canada K1N 6N5

Jonathan G. Underwood

  • Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, England, United Kingdom

Albert Stolow

  • Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario, Canada K1N 6N5; Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5; and National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6

Iain Wilkinson

  • National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6 and Methoden der Materialentwicklung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany

Paul Hockett and Rune Lausten

  • National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6

  • *vmakhija@uottawa.ca
  • paul@femtolab.ca

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Issue

Vol. 97, Iss. 6 — June 2018

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