trajectory is symmetric about any turning point.

For $\Delta t = 1,600\ \rm{fm}/c$ we descry in the [UCE]{} case as much as $27$ distinct apocenters (at $r=r_{Max}$). These are correlated with a number of $13$ complete and one incomplete revolutions about the center of the force field (*i.e.* $27$ straight lines before $r(t)$ changes its sense of variation).

The particle completely sweeps over twice the 2D configuration space after $1,537\ \rm{fm}/c$. However, we notice that the bound trajectories are open, which means that the orbits never pass twice through a given point (see Fig. \[fig:2\]), which is in concordance with Bertrand’s theorem. We briefly remind that for a bound orbit to be closed, the angle between two consecutive apocenters must be:

$$\Delta \theta = 2\pi \cdot \frac{n_{1}}{n_{2}},$$

*i.e.* after $n_{2}$ revolutions about the center, the radius vector should sweep out a multiple $n_{1}$ of $2\pi$ [radians]{}. For the [UCE]{} case above considered we consequently obtain: $\Delta \theta_{UCE} \approx 4\pi/13$ [radians]{} (Fig. \[fig:2\] - left column).

The kinetic energy points are displayed in right isosceles triangular shaped patterns (Fig. \[fig:3\]), whose hypotenuses are described by Eqs. (11) and (12), for the two specific non-chaotical situations: [UCE]{} and the intermittent monopolar “window” 