Superfluid dynamics of $^{258}$Fm fission

Abstract : Theoretical description of nuclear fission remains one of the major challenges of quantum many-body dynamics. The slow, mostly adiabatic motion through the fission barrier is followed by a fast, non-adiabatic descent of the potential between the fragments. The latter stage is essentially unexplored. However, it is crucial as it generates most of the excitation energy in the fragments. The superfluid dynamics in the latter stage of fission is obtained with the time-dependent Hartree-Fock theory including BCS dynamical pairing correlations. The fission modes of the 258Fm nucleus are studied. The resulting fission fragment characteristics show a good agreement with experimental data. Quantum shell effects are shown to play a crucial role in the dynamics and formation of the fragments. The importance of quantum fluctuations beyond the independent particle/quasi-particle picture is underlined and qualitatively studied.
Keywords : Fission TDHF pairing
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Article dans une revue
Physical Review C, American Physical Society, 2015, 92, pp.011602. 〈10.1103/PhysRevC.92.011602〉
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Contributeur : Michel Lion <>
Soumis le : vendredi 16 janvier 2015 - 09:12:43
Dernière modification le : jeudi 1 février 2018 - 01:25:41

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G. Scamps, C. Simenel, D. Lacroix. Superfluid dynamics of $^{258}$Fm fission. Physical Review C, American Physical Society, 2015, 92, pp.011602. 〈10.1103/PhysRevC.92.011602〉. 〈in2p3-01104066〉

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