Systematic study of (p,\gamma) reactions on Ni isotopes
A. Simon, A. Spyrou, T. Rauscher, C. Fr\"ohlich, S. J. Quinn, A., Battaglia, A. Best, B. Bucher, M. Couder, P. A. DeYoung, X. Fang, J., G\"orres, A. Kontos, Q. Li, L.-Y. Lin, A. Long, S. Lyons, A. Roberts, D., Robertson, K. Smith, M. K. Smith, E. Stech, B. Stefanek, W. P. Tan
TL;DR
This study systematically measures (p,) reactions on all stable nickel isotopes using proton beams and gamma detection, resolving previous data discrepancies and refining astrophysical reaction rates.
Contribution
It provides new experimental data on (p,) reactions for nickel isotopes and improves theoretical reaction rate predictions for astrophysical models.
Findings
Resolved discrepancies in previous measurements.
Provided new reaction rate data for astrophysics.
Compared experimental results with theoretical models.
Abstract
A systematic study of the radiative proton capture reaction for all stable nickel isotopes is presented. The results were obtained using 2.0 - 6.0 MeV protons from the 11 MV tandem Van de Graaff accelerator at the University of Notre Dame. The \gamma-rays were detected by the NSCL SuN detector utilising the \gamma-summing technique. The results are compared to a compilation of earlier measurements and discrepancies between the previous data are resolved. The experimental results are also compared to the theoretical predictions obtained using the NON-SMOKER and SMARAGD codes. Based on these comparisons an improved set of astrophysical reaction rates is proposed for the (p,\gamma) reactions on the stable nickel isotopes as well as for the 56Ni(p,\gamma)57Cu reaction.
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