The mass of neutron-deficient nuclide ⁵⁸Zn has been directly measured by using Bρ-defined isochronous mass spectrometry, resulting in a more precise proton separation energy of Sₚ(⁵⁸Zn)=2227(36) keV. With this new Sₚ value, the thermonuclear rate of the ⁵⁷Cu(p,γ)⁵⁸Zn reaction has been re-evaluated to be higher than the most recently published rate by a factor of up to 3 in the temperature range of 0.2 GK T 1.5 GK. The new rate is used to investigate its astrophysical impact via one-zone post-processing type-I x-ray burst calculations. It shows that the updated rate and new Sₚ(⁵⁸Zn) value result in noticeable abundance variations for nuclei with $A=56$--59 and a reduction in $A=57$ abundance by up to $20.7%$, compared with the results using the recently published rate.
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Zhang et al. (2024) studied this question.
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