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Single-particle shell strengths near the doubly magic nucleus 56Ni and the 56Ni(p,γ)57Cu reaction rate in explosive astrophysical burning

Research output: Contribution to journalArticle

  • T. Poxon-Pearson
  • F. M. Nunes
  • B. A. Brown
  • H. Schatz
  • T. Baumann
  • D. Bazin
  • J. A. Belarge
  • P. C. Bender
  • B. Elman
  • A. Estrade
  • A. Gade
  • A. Kankainen
  • S. Lipschutz
  • B. Longfellow
  • S. -J. Lonsdale
  • E. Lunderberg
  • F. Montes
  • W. J. Ong
  • G. Perdikakis
  • J. Pereira
  • C. Sullivan
  • R. Taverner
  • D. Weisshaar
  • R. Zegers

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Original languageEnglish
Number of pages5
JournalPhysics Letters B
Early online date25 Jul 2019
Publication statusPublished - 10 Oct 2019


Angle-integrated cross-section measurements of the 56Ni(d,n) and (d,p) stripping reactions have been performed to determine the single-particle strengths of low-lying excited states in the mirror nuclei pair 57Cu−57Ni situated adjacent to the doubly magic nucleus 56Ni. The reactions were studied in inverse kinematics utilizing a beam of radioactive 56Ni ions in conjunction with the GRETINA γ-array. Spectroscopic factors are compared with new shell-model calculations using a full pf model space with the GPFX1A Hamiltonian for the isospin-conserving strong interaction plus Coulomb and charge-dependent Hamiltonians. These results were used to set new constraints on the 56Ni(p,γ)57Cu reaction rate for explosive burning conditions in x-ray bursts, where 56Ni represents a key waiting point in the astrophysical rp-process.

    Research areas

  • nucl-ex, astro-ph.SR, nucl-th

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