Abstract
High-spin states in $^{74}\mathrm{Kr}$ were studied using the $^{58}\mathrm{Ni}$${(}^{19}$F,p2n${)}^{74}$Kr reaction at 62 MeV. States up to (${14}^{+}$) in the ground state band and a number of states in three side bands were placed in the level scheme. The level scheme of $^{74}\mathrm{Kr}$ closely resembles those of $^{76}\mathrm{Kr}$ and $^{78}\mathrm{Kr}$. Quasiparticle alignment occurs at \ensuremath{\Elzxh}\ensuremath{\omega}\ensuremath{\approxeq}0.65 MeV in agreement with a recent calculation. There is no evidence for an alignment at lower frequency as was previously reported. Mean lifetimes were measured for six states in the ground state band of $^{74}\mathrm{Kr}$ using the Doppler shift attenuation and recoil-distance methods. The lifetimes imply transition quadrupole moments of 3.2-3.3 eb, the highest known among Kr isotopes. The corresponding axial deformation is ${\mathrm{\ensuremath{\beta}}}_{2}$\ensuremath{\approxeq}0.41.
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