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Microscopic structure of coexisting 0+ states in Ni 68 probed via two-neutron transfer

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Author(s)

  • F. Flavigny
  • J. Elseviers
  • C. Bauer
  • V. Bildstein
  • A. Blazhev
  • B. A. Brown
  • H. De Witte
  • J. Diriken
  • V. N. Fedosseev
  • S. Franchoo
  • R. Gernhäuser
  • M. Huyse
  • S. Ilieva
  • S. Klupp
  • Th. Kröll
  • R. Lutter
  • B. A. Marsh
  • D. Mücher
  • K. Nowak
  • T. Otsuka
  • J. Pakarinen
  • N. Patronis
  • R. Raabe
  • F. Recchia
  • P. Reiter
  • T. Roger
  • S. Sambi
  • M. Seidlitz
  • B. Siebeck
  • Y. Tsunoda
  • P. Van Duppen
  • M. Vermeulen
  • M. Von Schmid
  • D. Voulot
  • N. Warr
  • F. Wenander
  • K. Wimmer

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Publication details

JournalPhysical Review C - Nuclear Physics
DateAccepted/In press - 1 May 2019
DatePublished (current) - 31 May 2019
Issue number5
Volume99
Number of pages1
Pages (from-to)054332
Original languageEnglish

Abstract

The structure of low-spin states originating from shape-coexisting configurations in Ni284068 was directly probed via the two-neutron transfer reaction Ni66(t,p)Ni68 in inverse kinematics using a radioactive ion beam on a radioactive target. The direct feeding to the first excited 0+ state was measured for center-of-mass angles 4-16 and amounts to an integral of 4.2(16)% relative to the ground state. The observed difference in feeding of the 0+ states is explained by the transfer of neutrons, mainly in the pf shell below N=40 for the ground state, and across N=40 in the g9/2 orbital for the 02+, based on second-order distorted-wave Born approximation calculations combined with state-of-the-art shell-model two-nucleon amplitudes. However, the direct feeding to the 21+ state [29(3)%] is incompatible with these calculations.

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© 2019, The Author(s).

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