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Title: Ejection of Quasi-Free-Electron Pairs from the Helium-Atom Ground State by Single-Photon Absorption

Abstract

We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique fingerprint of an elusive quasifree photon double ionization mechanism predicted by Amusia et al. nearly four decades ago. It results from the nondipole part of the electromagnetic interaction. Our experimental data are supported by calculations performed using the convergent close-coupling and time-dependent close-coupling methods.

Authors:
 [1];  [2];  [3];  [3];  [3];  [3];  [4];  [1];  [4];  [4];  [5];  [6];  [7];  [8];  [3];  [3];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. Frankfurt (Germany)
  3. Univ. Frankfurt (Germany)
  4. Auburn Univ., AL (United States)
  5. Kansas State Univ., Manhattan, KS (United States)
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  7. Australian National Univ., Canberra, ACT (Australia)
  8. Curtin Univ., Perth (Australia)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Chemical Sciences, Geosciences & Biosciences Division (SC-22.1); USDOE
OSTI Identifier:
1511365
Alternate Identifier(s):
OSTI ID: 1104426
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 1; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Schöffler, M. S., Stuck, C., Waitz, M., Trinter, F., Jahnke, T., Lenz, U., Jones, M., Belkacem, A., Landers, A. L., Pindzola, M. S., Cocke, C. L., Colgan, J., Kheifets, A., Bray, I., Schmidt-Böcking, H., Dörner, R., and Weber, Th. Ejection of Quasi-Free-Electron Pairs from the Helium-Atom Ground State by Single-Photon Absorption. United States: N. p., 2013. Web. doi:10.1103/PhysRevLett.111.013003.
Schöffler, M. S., Stuck, C., Waitz, M., Trinter, F., Jahnke, T., Lenz, U., Jones, M., Belkacem, A., Landers, A. L., Pindzola, M. S., Cocke, C. L., Colgan, J., Kheifets, A., Bray, I., Schmidt-Böcking, H., Dörner, R., & Weber, Th. Ejection of Quasi-Free-Electron Pairs from the Helium-Atom Ground State by Single-Photon Absorption. United States. doi:10.1103/PhysRevLett.111.013003.
Schöffler, M. S., Stuck, C., Waitz, M., Trinter, F., Jahnke, T., Lenz, U., Jones, M., Belkacem, A., Landers, A. L., Pindzola, M. S., Cocke, C. L., Colgan, J., Kheifets, A., Bray, I., Schmidt-Böcking, H., Dörner, R., and Weber, Th. Mon . "Ejection of Quasi-Free-Electron Pairs from the Helium-Atom Ground State by Single-Photon Absorption". United States. doi:10.1103/PhysRevLett.111.013003. https://www.osti.gov/servlets/purl/1511365.
@article{osti_1511365,
title = {Ejection of Quasi-Free-Electron Pairs from the Helium-Atom Ground State by Single-Photon Absorption},
author = {Schöffler, M. S. and Stuck, C. and Waitz, M. and Trinter, F. and Jahnke, T. and Lenz, U. and Jones, M. and Belkacem, A. and Landers, A. L. and Pindzola, M. S. and Cocke, C. L. and Colgan, J. and Kheifets, A. and Bray, I. and Schmidt-Böcking, H. and Dörner, R. and Weber, Th.},
abstractNote = {We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique fingerprint of an elusive quasifree photon double ionization mechanism predicted by Amusia et al. nearly four decades ago. It results from the nondipole part of the electromagnetic interaction. Our experimental data are supported by calculations performed using the convergent close-coupling and time-dependent close-coupling methods.},
doi = {10.1103/PhysRevLett.111.013003},
journal = {Physical Review Letters},
number = 1,
volume = 111,
place = {United States},
year = {2013},
month = {7}
}

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