Fig. 2. 205Tl experiment setup and results.
a, A 206Pb67+ beam was accelerated by the SIS-18 synchrotron and projectile fragmentation produced 205Tl81+ ions that were selected by the FRS and stored in the ESR. Copyright, GSI/FAIR. b, Ion intensity monitoring shows the accumulation and storage of 205Tl81+ ions, as well as the revelation of 205Pb82+ daughter ions once the gas target is turned on. Note that the 205Pb82+ intensity is scaled by 103 so that it is visible. c, The observed ratio of 205Pb81+ to 205Tl81+ ions for 16 storage runs is shown, alongside the best fit of equation (1) (blue line). Error bars are 1σ Gaussian.