Abstract

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.

Highlights

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

  • 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 p f model space with the GPFX1A Hamiltonian for the isospin-conserving strong interaction plus Coulomb and chargedependent Hamiltonians

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Summary

Introduction

Single-particle shell strengths near the doubly magic nucleus 56Ni and the 56Ni(p,γ )57Cu reaction rate in explosive astrophysical burning. Please cite the original version: Kahl, D., Woods, P., Poxon-Pearson, T., Nunes, F., Brown, B., Schatz, H., Baumann, T., Bazin, D., Belarge, J., Bender, P., Elman, B., Estrade, A., Gade, A., Kankainen, A., Lederer-Woods, C., Lipschutz, S., Longfellow, B., Lonsdale, S.-J., Lunderberg, E., .

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