Indirect mass determination for the neutron-deficient nuclides 44V, 48Mn, 52Co and 56Cu

Mass excess values for 44V, 52Co and 56Cu are derived indirectly using the mirror symmetry and known data from beta-delayed proton spectroscopy. The new mass excess obtained by using the energy conservation for 48Mn is −29303(14) keV, which is an improvement by about an order of magnitude compared to the AME'12 value. Compared to previously known data, the new proton separation energy for 45Cr causes a ∼3.5 times smaller matter flow through the CaSc cycle during the rp-process. Obtained proton separation energies for 52Co and 56Cu are about 500 keV larger than the AME'12 values. If confirmed, this would affect photo disintegration rates of 52Co (γ,p)(γ,p)51Fe and 56Cu (γ,p)(γ,p)55Ni reactions during the rp-process in X-ray bursts.