Theory of fast (nonadiabatic) nuclear rotation

The theory of backbending is developed taking into accout the increasing role of nonadiabatic effects, which are concerned with quantum number K violation. Above the transition point, rotation quantum number j (>=) jsub(c) (second-kind transition point), all possible values of the quantity K in the interval -J (<=) K (<=) J are of equal probability. The singularity of ordering parameters, which is proportional to spectroscopic quadrupole moment of nonspherical nucleus, angular velocity and moment of inertia near the Curie point are considered. The formulae of the quadrupole radiation intensity for highly symmetric n-phase with J > Jsub(c) are obtained. The radius of global nucleon mass distribution in the nucleus is defined from the analysis of the experimental moments of inertia in n-phase. It is in agreement with the radius of distribution of protons alone obtained from electron scattering on nuclei. Assuming the simplest singularity of parametric derivative of the Hamiltonian of the system the general theory of non-temperature (ground state)second-kind phase transitions is developed