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

Research output: Contribution to journalArticle

Authors

  • Jan Diriken
  • F. Flavigny
  • Jytte Elseviers
  • Andrei N. Andreyev
  • Christopher Bauer
  • Vincenz Bildstein
  • Andrey Blazhev
  • Hilde De Witte
  • Valentin N. Fedosseev
  • CSNSM-IN2P3-CNRS - Université Paris Sud
  • KUL - Katholieke Universiteit Leuven
  • SCK•CEN - Studiecentrum voor Kernenergie/Centre d’Etude de l’Energie Nucléaire
  • University of York
  • ASRC - Advanced Science Research Center - JAEA
  • Technical university Darmstadt - Technische Universität Darmstadt, Institut für Kernphysik - Germany
  • TUM - Technical University of Munich
  • Institut für Kernphysik der Universität zu Köln
  • CERN - Conseil Européen pour la Recherche Nucléaire

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Abstract

The structure of low-spin states originating from shape-coexisting configurations in 6840Ni28 was directly probed via the two-neutron transfer reaction 66Ni(t,p)68Ni 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 0+2, 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 2+1 state [29(3)%] is incompatible with these calculations.

Details

Original languageEnglish
Article number054332
Pages (from-to)1-6
Number of pages6
JournalPhysical Review C
Volume99
DOIs
Publication statusPublished - 31 May 2019
Externally publishedYes

Keywords

  • Transfer reaction, Energy levels, 68Ni, two-neutron transfer

ID: 6739041