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In-beam γ-spectroscopy with relativistic radioactive ion beams

  • S. Wan
  • J. Gerl
  • J. Cub
  • J.M. Holeczek
  • P. Reiter
  • D. Schwalm
  • T. Aumann
  • K. Boretzky
  • W. Dostal
  • B. Eberlein
  • H. Emling
  • Ch. Ender
  • Th.W. Elze
  • H. Geissel
  • A. Grünschloß
  • R. Holzmann
  • N. Iwasa
  • M. Kaspar
  • A. Kleinböhl
  • O. Koschorrek
  • Y. Leifels
  • A. Leistenschneider
  • I. Peter
  • H. Schaffner
  • C. Scheidenberger
  • R. Schubart
  • R. Schubert
  • H. Simon
  • G. Stengel
  • A. Surowiec
  • H.J. Wollersheim
Nuclear structure and reactions

Abstract:

This work demonstrates the feasibility of in-beam γ-spectroscopy employing radioactive ion beam species at relativistic energies of E = 210 ∼ 280 A· MeV. Neutron-rich nuclei below 48Ca with neutron number between the two magic numbers 20 and 28 have been investigated. Using a Pb target, single step inelastic excitation originating mainly from Coulomb interaction takes place populating preferentially low-lying low-spin states and enabling the extraction of B(E2) values. On a C target, nucleon removal reactions are dominating and medium-spin states are populated thus offering spectroscopic information in neighboring nuclei. Cross sections of inelastic excitation are determined and compared to coupled-channels calculations. Two new states of the very neutron-rich nucleus 44Ar at 1.78(8) MeV and 2.61(16) MeV are deduced from γ-transitions.

PACS: 25.60.+v reactions induced by unstable nuclei – 25.75.+r relativistic heavy ion collisions – 23.20.Lv gamma transitions and level energies – 27.40.+z 39 < A < 58 – 29.30.Kv X- and γ-ray spectroscopy 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • S. Wan
    • 1
  • J. Gerl
    • 1
  • J. Cub
    • 6
  • J.M. Holeczek
    • 7
  • P. Reiter
    • 5
  • D. Schwalm
    • 2
  • T. Aumann
    • 1
  • K. Boretzky
    • 4
  • W. Dostal
    • 4
  • B. Eberlein
    • 4
  • H. Emling
    • 1
  • Ch. Ender
    • 2
  • Th.W. Elze
    • 3
  • H. Geissel
    • 1
  • A. Grünschloß
    • 3
  • R. Holzmann
    • 1
  • N. Iwasa
    • 1
  • M. Kaspar
    • 1
  • A. Kleinböhl
    • 1
  • O. Koschorrek
    • 2
  • Y. Leifels
    • 1
  • A. Leistenschneider
    • 3
  • I. Peter
    • 1
  • H. Schaffner
    • 1
  • C. Scheidenberger
    • 1
  • R. Schubart
    • 1
  • R. Schubert
    • 1
  • H. Simon
    • 6
  • G. Stengel
    • 3
  • A. Surowiec
    • 1
  • H.J. Wollersheim
    • 1
  1. 1.Gesellschaft für Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, GermanyDE
  2. 2.Max-Planck-Institut für Kernphysik, Postfach 103980, 69029 Heidelberg, GermanyDE
  3. 3.Institut für Kernphysik, Universität Frankfurt, 60486 Frankfurt, GermanyDE
  4. 4.Institut für Kernchemie, Universität Mainz, 55029 Mainz, GermanyDE
  5. 5.Sektion Physik der LMU München, Am Coulombwall 1, 85748 Garching, GermanyDE
  6. 6.Institut für Kernphysik, Technische Universität Darmstadt, 64289, GermanyDE
  7. 7.Instytut Fizyki, Uniwersytet Śląski, 40-007 Katowice, PolandPL

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