Abstract
Rotational bands in neutron-rich 98Sr nucleus havebeen investigated by measuring high-fold prompt γ-raycoincidence events of the spontaneous fission of 252Cfwith the Gammasphere detector array. A deformed K = 3 band built on the1838 keV level has been confirmed and extended. Another deformed K = 6band based on the 2535 keV level has been established. Both the bandsoriginate most probably from the ν9/2[404]⊗ν3/2[411]two-quasiparticle configuration with Ω = |Ω1−Ω2|and Ω = |Ω1+Ω2|, respectively. Based on thedelay-coincidence measurements, the half-lives for the K = 3 and K = 6band head levels have been obtained to be 13±3 ns and 4.5±1.0 ns, respectively.
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