On the other hand when quantal effects are included, the asymmetric fragment partition related to $\alpha \approx \pm 0.035$ corresponds to a barrier of $0.1$ MeV. One notices that in spite of a lower barrier height when including microscopic corrections the corresponding fission time is larger than in the semi-classical picture. One understands this result if we compare the typical symmetric trajectory drawn on Fig. 5 to the typical asymmetric trajectory drawn on Fig. 9. In the former case the system cannot overcome the rather high [*mountain top*]{} at $c \approx 1.55$ for $\alpha \in [-0.06 \,,\, 0.06]$ and consequently has to bypass it along $\alpha \approx \pm 0.1$ before reaching the asymmetric valley for $\alpha \approx \pm 0.035$. One could say that the path is [*longer*]{}. Let us note that a small energy difference (of the order of a few hundreds keV) between valleys can lead to very different fragment distributions what suggests the strong dependence of the dynamics on the [*details*]{} of the energy landscape. This drastic sensitivity to the structure of the landscape requires to be careful when one performs energy calculations in the deformation space.

Dynamics including light-particle evaporation
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Even if we know that particle 