Recent Results of the Time-of-Flight Magnetic-Rigidity (TOF-Bρ) Mass Measurements

Nuclear masses are crucial to understand both nuclear structure and nuclear astrophysics. In particular masses around A=40 are essential for the nuclear processes occurring in the crust of an accreting neutron star and the evolution of nuclear shell closures towards the neutron drip-line. Furthermore, masses of heavy isotopes beyond the N=50 shell closure are valuable input for the r-process models. One of the techniques available to access these short-lived exotic nuclei is the TOF-Bρ technique. In the last TOF-Bρ experiment at the National Superconducting Cyclotron Laboratory (NSCL), we measured the masses near the ⁴²Si region using the fragmentation of ⁴⁸Ca. A previous TOF-Bρ experiment at NSCL measured the masses near the N=70 region from Zr to Ru using the fragmentation of ¹²⁴Sn. I will present the status and results of these experiments. In addition, with the Facility for Rare Isotope Beams (FRIB), we can expect to expand the current reach for measurements of the nuclear mass surface. I will discuss the future plans of the TOF-Bρ collaborations at FRIB.