Gamma-gamma angular correlations of transitions inSr94andSr96

Angular-correlation measurements were made on ten direct cascades and four skip cascades in ${}_{}{}^{94}{}_{}{}^{}\mathrm{Sr}$ and on nine direct cascades in ${}_{}{}^{96}{}_{}{}^{}\mathrm{Sr}$. These nuclei were populated by beta decay of isotopically pure ${}_{}{}^{94}{}_{}{}^{}\mathrm{Rb}$ and ${}_{}{}^{96}{}_{}{}^{}\mathrm{Rb}$ ion beams produced by fission and on-line mass separation. Correlations were measured for most of the intense transitions in coincidence with the $2^{+}$→$0^{+}$ ground-state transition in both nuclei and two additional transitions in ${}_{}{}^{94}{}_{}{}^{}\mathrm{Sr}$. Five levels in ${}_{}{}^{94}{}_{}{}^{}\mathrm{Sr}$ are given definite spin assignments and four levels tentative assignments. In ${}_{}{}^{96}{}_{}{}^{}\mathrm{Sr}$ definite spin assignments are made for four levels and tentative assignments for five levels. Values are listed for angular-correlation coefficients and, where applicable, multipole mixing ratios. Level systematics of neutron-rich even mass Sr isotopes are discussed within the context of assignments made here.