Backbending region study in ¹⁶⁰Dy nucleus using triaxial projected shell model

Investigations of the ground state bands of nuclei at A ∼ 160 mass region have become a particularly interesting research in nuclear structure studies. These nuclei exhibit a range of interesting features, including oblate and prolate deformations as well as rapid variations in shape as a function of both spin and particle number. The effect of the backbending occurs due to the rapid increase of the moment of inertia with rotational frequency towards the rigid value. When the rotational energy exceeds the energy needed to break a pair of nucleon, the unpaired nucleon goes into different orbits, which result in change of the moment of inertia. An explanation of this effect is due to a disappearance of the pairing correlation by the action of Coriolis forces, where the nucleus then undergoes a phase transition from a superfluid state to a state of independent particle motion