2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/81709The present communication is a continuation of the review, the first part of which was presented in nucl-th/0109033. The second part dealswith the manifistation of Chaotic dynamics at quantum level. The variations of statistical properties of energy spectrum in the process of R-C-R transition have been studied in detail. We proved that the type of the classical motion is correlated with the structure of the eigenfunctions of highly excited states in the R-C-R transition. Shell structure destruction induced by the increase of nonintegrable perturbation was analyzed.53 pages, LaTex, 21 figuresNuclear Theorytext