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Microscopic Phase-Space Exploration Modeling of 258Fm Spontaneous Fission

Y. Tanimura, D. Lacroix and S. Ayik

The microscopic description of fission is one of the most challenging problem of nuclear theory. The complexity stems from the necessity to treat simultaneously the quantum nature of both single-particle and collective degrees of freedom as well as the nuclear superfluidity. A new approach has been proposed recently in IPN Orsay. In this approach, quantum effects in collective space are treated by initial fluctuations in the collective phase-space followed by an ensemble of microscopic time-dependent mean-field theory including superfluid effects. The new theory was applied to the description of the spontaneous fission of 258Fm. It was shown that the fission mass fragment and their kinetic energies can be reasonably well reproduced.

Some examples of final density profiles obtained after mean-field evolution. Due to the initial fluctuations, a variety of fission fragments properties are obtained.

See online : Phys. Rev. Lett. 118, 152501 (2017)



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