In-beam γ-ray spectroscopy of ⁶³Zn

Detail study of nuclear structure in mass region A ∼ 60 reveals various interesting phenomena. Both single particle and collective excitations with various shapes, namely, prolate, oblate and triaxial have been observed in this region. Here, the active orbitals are 2p_3/2, 1f_5/2, 2p_1/2 in the upper fp shell and an intruder 1g_9/2 orbital. The lower excitations are due to the negative parity 2p_3/2, 1f_5/2 and 2p_1/2 orbitals but most of the high spin states are mainly due to the presence of the high j 1f_7/2 and 1g_9/2 intruder orbitals. Presence of holes in 1f_7/2 orbital and particles in 1g_9/2 leads to a transition from spherical towards deformed shapes and enhances the possibility of collective rotational excitations. Among the ^61,63,65Zn isotopes, ⁶¹Zn is interesting as it has several normal and super deformed bands. The present experiment was performed with Indian National Gamma Array (INGA), which consists of fourteen Compton suppressed HPGe clover detectors to get more insight into the nuclear structure of ⁶³Zn