Triaxial shapes in nuclei of mass ∼ 130: a perspective through lifetime measurements

In the nuclear landscape, atomic nuclei are characterized by diverse shapes. The nuclear force, which is responsible for binding nucleons in the nucleus, is not well understood yet and more experimental inputs are required for a better understanding. This thesis work is focused on the structure of nuclei near mass 130 region. The nuclei in this region tend to have triaxial nuclear shape due to the presence of oblate driving νh_11/2 and prolate driving πh_11/2 orbitals near the Fermi surface, which leads to the various interesting nuclear phenomena. In the present work, we have studied different nuclear properties through the measurement of lifetimes using the technique of Doppler shift attenuation method (DSAM). The reduced transition probability (B(E2)) is a sensitive observable for providing a stringent test to various theoretical models. The single-quasi particle rotor model (PRM) is employed to interpret the experimental results