Triaxial projected shell model study of multi-phonon γ-band in ¹⁶⁵Ho nucleus

For the comprehensive understanding of the triaxial nuclei having rich experimental high spin band structures a history of theoretical models have proposed to study these band structures with varying degrees of success. Like The quasiparticle phonon nuclear model (QPNM), the multiphonon method (MPM), the dynamic deformation model (DDM), algebraic models including the extended version of the interacting boson (sdg-IBM) and pseudosymplectic models have also been employed to study the γ-excitation modes and these predict high collectivity for the double-γ vibration. We would also like to add that a considerable effort has been devoted in understanding the γ-excitation mechanism by using the random phase approximation (RPA) approach