Lifetimes of high-spin states in 74Kr

High‐spin states in 3674Kr38 were studied using the 40Ca(40Ca,α2p)74Kr fusion evaporation reaction at a beam energy of 165 MeV with GAMMASPHERE and MICROBALL and at a beam energy of 185 MeV with EUROBALL and ISIS multi‐detector arrays. Lifetimes of the high‐spin states for the ground‐state band and the favoured negative‐parity band have been determined using the Doppler‐shift attenuation method. The deduced transition quadrupole moments show a marginal decrease as a function of spin, suggesting that the rotational bands do not terminate at the maximum spin Imax.