Abstract
We investigate the dependence of the level density in the second potential well on the nuclear shape symmetry for actinide nuclei. We compare statistical theory calculations with the experimental results deduced by observing the fission times of Pa and Np isotopes. In the weak-coupling approximation of the two classes of excited states we find that the level density in the second well, higher than the one in the first well, is related to a symmetry breakdown of the nuclear shape of the second saddle point.
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