Probing nuclear structure around doubly-magic ¹³²Sn through lifetime measurements

Nuclear structure studies around doubly magic ¹³²Sn are of contemporary interest and are being explored with different experimental techniques. One of the key focuses is on the measurement of nuclear level lifetimes and hence transition probabilities for the low lying levels as this provides direct insight into the nucleon-nucleon interactions. Systematic measurements in nuclei around ¹³²Sn, having few proton particles away from Z=50 or few neutron holes away from N=82 are useful to understand the evolution of nuclear structure between two extreme double shell closures of ¹⁰⁰Sn and ¹³²Sn. However, the availability of spectroscopic information around ¹³²Sn is very scanty as there is experimental difficulty in reaching this region by compound nuclear or transfer reactions using the available target-projectile combinations. In this context, the measurement of nuclear level lifetimes in ^130-132Te and ¹²⁹Sn is of extreme importance to understand the nucleon-nucleon interaction and the role of configuration mixing around double shell closure of ¹³²Sn. In the present work, lifetimes have been measured for the low lying levels in the ^130,132Te and ¹²⁹Sn nuclei using γ-γ fast timing technique (Generalized Centroid difference method)