to positively identify chaotic patterns, by transition from a quasi-continuous spectrum of the one-nucleon radial coordinate ($\Omega _{ad}=0.02\ c/\rm{fm}$) to a discrete periodical one, containing fundamental frequencies of the system and its harmonics ($\Omega=0.1\ c/\rm{fm}$) and again to a continuous spectrum at the resonance vibrational frequency ($\Omega _{res}=0.145\ c/\rm{fm}$) (Fig. \[fig:5\] - right panels). The order-chaos-order-chaos sequence can be also spotted out for the monopole oscillations in the power spectra of the collective degree of freedom (Fig. \[fig:7\] - second column).

The temporal series of the radius variable show a symmetrical sawtooth waveform for the uncoupled situation at any chosen vibration frequency, and also for the monopole case at adiabatic collective oscillations. For the rest, in general an asymmetrical sawtooth form defines the series, but sometimes, more complicated patterns appear at higher multipole orders (Figures 1-4 - [@felea-09a]).

The difference between two successive maxima in the temporal series of the radius variable for the [UCE]{} case is: $T_{0_{UCE}} \approx 1,537/26 = 59.1\ \rm{fm}/c$ (left column of Fig. \[fig:2\]) and can be also obtained from the sensitive dependence on the initial conditions analysis (see Fig. 1 - [@felea-09a]). The fundamental frequency for the radial sawtooth temporal series: $\omega_{0_{UCE}}=2\pi/T_{0_{UCE}}=0.106\ c/\rm{fm}$ and its 