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Electron-loss-to-continuum cusp in U88++N2 collisions

P.-M. Hillenbrand, S. Hagmann, A. B. Voitkiv, B. Najjari, D. Banaś, K.-H. Blumenhagen, C. Brandau, W. Chen, E. De Filippo, A. Gumberidze, D. L. Guo, C. Kozhuharov, M. Lestinsky, Yu. A. Litvinov, A. Müller, H. Rothard, S. Schippers, M. S. Schöffler, U. Spillmann, S. Trotsenko, X. L. Zhu, and Th. Stöhlker
Phys. Rev. A 90, 042713 – Published 27 October 2014

Abstract

The electron loss to the continuum has been studied for the collision system U88++N2U89++N2*+e at the low-relativistic projectile energy of 90 MeV/u. Using a magnetic electron spectrometer, the energy distribution of cusp electrons emitted at an angle of 0 with respect to the projectile beam was measured in coincidence with the up-charged projectile. At the experimental collision energy ionization of the berylliumlike U88+ projectile proceeds predominantly from the L shell, but a contribution from the K shell could also be identified experimentally. The measurement is shown to be in accordance with fully relativistic Dirac calculations applying first-order perturbation theory. Furthermore, the underlying continuum electron distribution in the projectile frame is illustrated.

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  • Received 16 September 2014

DOI:https://doi.org/10.1103/PhysRevA.90.042713

©2014 American Physical Society

Authors & Affiliations

P.-M. Hillenbrand1,2,*, S. Hagmann1,3,†, A. B. Voitkiv3,4,5, B. Najjari6, D. Banaś7, K.-H. Blumenhagen1,8,9, C. Brandau2,10, W. Chen1, E. De Filippo11, A. Gumberidze10,12, D. L. Guo13, C. Kozhuharov1, M. Lestinsky1, Yu. A. Litvinov1,4,14, A. Müller2, H. Rothard15, S. Schippers2, M. S. Schöffler3, U. Spillmann1, S. Trotsenko1,8, X. L. Zhu13, and Th. Stöhlker1,8,9

  • 1GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
  • 2Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
  • 3Institut für Kernphysik, Goethe Universität Frankfurt, D-60438 Frankfurt am Main, Germany
  • 4Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
  • 5Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, D-40225 Düsseldorf, Germany
  • 6Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, F-67037 Strasbourg Cedex 2, France
  • 7Institute of Physics, Jan Kochanowski University, PL-25-406 Kielce, Poland
  • 8Helmholtz-Institut Jena, D-07743 Jena, Germany
  • 9Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany
  • 10ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
  • 11Istituto Nazionale di Fisica Nucleare Sezione di Catania, I-95123 Catania, Italy
  • 12FIAS Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany
  • 13Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 14Ruprecht-Karls Universität Heidelberg, D-69120 Heidelberg, Germany
  • 15Centre de Recherche sur les Ions, les Matériaux et la Photonique, CIMAP-CIRIL-Ganil, F-14070 Caen, France

  • *p.m.hillenbrand@gsi.de
  • s.hagmann@gsi.de

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Vol. 90, Iss. 4 — October 2014

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