$\alpha$-, $\beta$-, and proton-decay energies have been combined with TITAN mass values for ${}^{150–157}\mathrm{Yb}$ to expand and refine the mass surface in the proton-rich $Z=70–82$ region. The calculations were performed using the Atomic Mass Evaluation (AME) algorithm, resulting in 11 new ground-state masses and uncertainty reductions of nine others. The new information allows the determination of the two-proton drip line for elements between Ir and Pb and provides indications of possible new candidates for two-proton emission. In addition, we examined binding energies in this region for Thomas-Ehrman shifts, so far only visible for light nuclides.

• Received 13 September 2022
• Accepted 3 February 2023
• Corrected 1 February 2024

DOI:https://doi.org/10.1103/PhysRevC.107.024311