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Microscopic description of fission in neutron-rich plutonium isotopes with the Gogny-D1M energy density functional

  • R. Rodrıguez-Guzmán
  • L. M. RobledoEmail author
Regular Article - Theoretical Physics

Abstract

The most recent parametrization D1M of the Gogny energy density functional is used to describe fission in the isotopes 232-280Pu . We resort to the methodology introduced in our previous studies (Phys. Rev. C 88, 054325 (2013) and Phys. Rev. C 89, 054310 (2014)) to compute the fission paths, collective masses and zero point quantum corrections within the Hartree-Fock-Bogoliubov framework. The systematics of the spontaneous fission half-lives t SF , masses and charges of the fragments in plutonium isotopes is analyzed and compared with available experimental data. We also pay attention to isomeric states, the deformation properties of the fragments as well as to the competition between the spontaneous fission and α-decay modes. The impact of pairing correlations on the predicted t SF values is demonstrated with the help of calculations for 232–280Pu, in which the pairing strengths of the Gogny-D1M energy density functional are modified by 5% and 10%, respectively. We further validate the use of the D1M parametrization through the discussion of the half-lives in 242–262Fm. Our calculations corroborate that, though the uncertainties in the absolute values of physical observables are large, the Gogny-D1M Hartree-Fock-Bogoliubov framework still reproduces the trends with mass and/or neutron numbers and therefore represents a reasonable starting point to describe fission in heavy nuclear systems from a microscopic point of view.

Keywords

Plutonium Quadrupole Moment Neutron Number Uranium Isotope Plutonium Isotope 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Department of Physics and AstronomyRice UniversityHoustonUSA
  2. 2.Department of ChemistryRice UniversityHoustonUSA
  3. 3.Departamento de Física TeóricaUniversidad Autónoma de MadridMadridSpain

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