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Title: High-precision B(E2) measurements of semi-magic 58,60,62,64Ni by Coulomb excitation

High-precision reduced electric-quadrupole transition probabilities B(E2) have been measured from single-step Coulomb excitation of semi-magic 58,60,62,64 Ni (Z = 28) beams at 1.8 MeV per nucleon on a natural carbon target. The energy loss of the nickel beams through the carbon target were directly measured with a zero-degree Bragg detector and the absolute B(E2) values were normalized by Rutherford scattering. The B(E2) values disagree with recent lifetime studies that employed the Doppler-shift attenuation method. The present high-precision B(E2) values reveal an asymmetry about 62 Ni, midshell between N = 28 and 40, with larger values towards 56 Ni (Z = N = 28). The experimental B(E2) values are compared with shell-model calculations in the full pf model space and the results indicate a soft 56 Ni core.
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [1] ;  [5] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. ORNL
  2. National Superconducting Cyclotron Laboratory (NSCL), Michigan State University
  3. {nmn} [ORNL
  4. Universidad Nacional Autonoma de Mexico (UNAM)
  5. Oak Ridge Associated Universities (ORAU)
Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review C; Journal Volume: 90; Journal Issue: 034309
Research Org:
Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility (HRIBF)
Sponsoring Org:
SC USDOE - Office of Science (SC)
Country of Publication:
United States