Storage-ring measurement of the hyperfine induced 47Ti18+(2s 2p 3P0 ->   2s2 1S0) transition rate
  The hyperfine induced 2s 2p 3P0 > 2s2 1S0 transition rate AHFI in berylliumlike 47Ti18+ was measured. Resonant electron-ion recombination in a heavy-ion storage ring was employed to monitor the time dependent population of the 3P0 state. The experimental value AHFI=0.56(3)/s is almost 60% larger than theoretically predicted. 
S. Schippers, E. W. Schmidt, D. Bernhardt, D. Yu, A. Mueller, M.   Lestinsky, D. A. Orlov, M. Grieser, R. Repnow, and A. Wolf