First Use of High Charge States for Mass Measurements of Short-lived   Nuclides in a Penning Trap
  Penning trap mass measurements of short-lived nuclides have been performed for the first time with highly-charged ions (HCI), using the TITAN facility at TRIUMF. Compared to singly-charged ions, this provides an improvement in experimental precision that scales with the charge state q. Neutron-deficient Rb-isotopes have been charge bred in an electron beam ion trap to q = 8 - 12+ prior to injection into the Penning trap. In combination with the Ramsey excitation scheme, this unique setup creating low energy, highly-charged ions at a radioactive beam facility opens the door to unrivalled precision with gains of 1-2 orders of magnitude. The method is particularly suited for short-lived nuclides such as the superallowed {\beta} emitter 74Rb (T1/2 = 65 ms). The determination of its atomic mass and an improved QEC-value are presented. 
S. Ettenauer, M. C. Simon, A. T. Gallant, T. Brunner, U. Chowdhury, V.   V. Simon, M. Brodeur, A. Chaudhuri, E. Man\'e, C. A...
nucl-ex physics.atom-ph