Speaker
Description
The Low-Energy Beam and Ion Trap (LEBIT) facility [1] at the recently commissioned Facility for Rare Isotope Beams (FRIB) remains the only facility that employs Penning trap mass spectrometry for high-precision mass measurements of rare isotopes produced via projectile fragmentation. This powerful combination of a fast, chemically insensitive rare isotope production method with a high-precision Penning trap mass spectrometer has yielded mass measurements of short-lived rare isotopes with precisions below 10 ppb across the chart of nuclides. The first LEBIT measurement campaigns in the FRIB era were a mass measurement of the proton dripline nucleus $^{22}$Al [2], a potential proton halo candidate, as well as providing an isomerically purified beam of $^{70}$Cu to the SuN total absorption spectrometer that was installed downstream of LEBIT.
To expand the experimental reach of Penning trap mass spectrometry to nuclides delivered at very low rates, the new Single Ion Penning Trap [3,4] (SIPT) has been built. SIPT uses narrowband FT-ICR detection under cryogenic conditions to perform mass measurements of high-impact candidates, delivered at rates as low as one ion per day, with only a single detected ion. Additional upgrades to the stopped beam facility at FRIB, including a high-resolution magnetic mass separator and high-performance MR-ToF will ensure that the mass measurement program will make optimal use of the wide range of rare isotope beams provided by FRIB.
[1] R. J. Ringle, S. Schwarz, and G. Bollen, Int. J. Mass Spectrom. 349-350, 87 (2013).
[2] S. Campbell, et al., Phys. Rev. Lett. 132, 152501 (2024).
[3] A. Hamaker, et al., Hyperfine Interact. 240, 34 (2019).
[4] S. Campbell et al., Atoms 11, 10 (2023).
