rp Process and Masses of N≈Z≈34 Nuclides

High-precision Penning-trap mass measurements of the N approximate to Z approximate to 34 nuclides Se-68, Se-70, Br-70m, and Br-71 were performed, reaching experimental uncertainties of 0.5-15 keV. The new and improved mass data together with theoretical Coulomb displacement energies were used as input for rp process network calculations. An increase in the effective lifetime of the waiting point nucleus Se-68 was found, and more precise information was obtained on the luminosity during a type I x-ray burst along with the final elemental abundances after the burst.