Study of Quantum Chaos in the Framework of Triaxial Rotator Models

Dynamical quantum chaos criteria - a perturbed wave function entropy W (Ψ _i and a fragmentation width K(pdbl _k) of basis states were studied in two cases of nuclear rigid triaxial rotator models. The first model is characterized by deformation angle γ only, while the second model depends on both quadrupole deformation parameters (β,γ). The degree of chaoticity has been determined in the studies of the dependence of criteria W(Ψ _i) and K(pdbl _k) from nuclear spin values up to I ≤ 101 for model parameters γ and (β,γ) correspondingly. The transition from librational to rotational type energy spectra has been considered for both models as well.