Deformation and shape coexistence of 0+ states in 98Sr and 100Zr

Abstract Half-lives of 2 1 + levels [2.80(8) ns in 98 Sr, 0.55(2) ns in 100 Zr] and the 98 Sr 4 1 + level [80(6) ps] were obtained using a β-γ-γ triple coincidence system. Analysis of B (E2) and B (E0) rates indicates that 98 Sr and 100 Zr have very similar structures. Both have a highly deformed (β∼0.4) yrast band and a moderately deformed (|β|∼0.2) low-lying band. The highly deformed bands in 98 Sr and 100 Zr are nearly identical to the yrast bands in 100 Sr and 102 Zr.