Variable moment of inertia (VMI) model and theories of nuclear collective motion

The treatment of the variable moment of inertia (VMI) model and theories of nuclear collective motion covers the interplay between the results of these empirical studies and the formulation of various nuclear models, the VMI model, relation between moment of inertia and transition quadrupole moment, transitions from the VMI phase, phenomenological generalizations of the VMI model for the low spin region, phenomenological band mixing models for the VMI and backbending regions, microscopic calculations of the VMI parameters, and the Hartree--Fock--Bogoliubov approach to the VMI region and backbending. 172 references