High spin states in 86Sr and their description using Shell model calculations

The properties of the nuclei around the shell closure at N = 50 vary drastically with small changes of the nucleon numbers. Low- spin states in N = 50 nuclei are not collective, as indicated by measured low transition strengths of B(E2). On the other hand, nuclei with two holes in the N = 50 shell show an onset of collectivity, which manifests itself in regular level sequences at low spin and moderate transition strengths of B(E2). The previously, the high-spin states of 86Sr has been studied using 84Kr(α,2n)86Sr reaction and 76Ge76,74Ge(16,18C,3n)86Sr. In this work we are reporting for high-spin state of 86Sr populated by 76Ge(13C,3n)86Sr reaction first time. The spin and parity of new observed states has been obtained using polarization asymmetry and directional correlation measurement