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Author Tolokonnikov, S. V. ♦ Borzov, I. N. ♦ Lutostansky, Yu. S. ♦ Panov, I. V. ♦ Saperstein, E. E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NUCLEAR PHYSICS AND RADIATION PHYSICS ♦ COMPARATIVE EVALUATIONS ♦ DEFORMATION ♦ DENSITY FUNCTIONAL METHOD ♦ DIAGRAMS ♦ ENERGY DENSITY ♦ FISSION BARRIER ♦ GROUND STATES ♦ HARTREE-FOCK METHOD ♦ HEIGHT ♦ NEPTUNIUM ISOTOPES ♦ NEUTRON SEPARATION ENERGY ♦ OCTUPOLES ♦ PHASE TRANSFORMATIONS ♦ PLUTONIUM ISOTOPES ♦ PROTONS ♦ SKYRME POTENTIAL ♦ URANIUM ♦ URANIUM 238
Abstract Fission barriers in nuclei belonging to the uranium region and their other characteristics are calculated on the basis of the FaNDF{sup 0} energy density functional. In particular, the neutron-separation energies S{sub n} and S{sub 2n}, the proton-separation energies S{sub p}, and the beta-transition energiesQ{sub β} are calculated for uranium, neptunium, and plutonium isotopes. In addition, the deformation energies and parameters of these nuclei are presented along with their radii. A comparison with the predictions of the Skyrme–Hartree–Fock method implemented with several versions of the Skyrme energy density functionals is performed. The role of the octupole deformation β{sub 3} is studied for the {sup 238}U nucleus. It is shown that this deformation does not have any significant effect on the first-barrier height B{sup (1)}{sub f} or ground-state properties. At the same time, the second-barrier height B(2) f decreases by a factor of about two upon taking into account β{sub 3}. A phase transition at A ~ 260 is found for the three isotopic chains being considered: this point is a bifurcation point at which B{sup (1)}{sub f} (A) forks into two curves. Of these, the curve B{sup (2)}{sub f} (A) splits from it, prolonging the former curve for B{sup (1)}{sub f} (A) almost continuously, whereas the curve for B{sup (1)}{sub f} (A) itself goes down sharply.
ISSN 10637788
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-07-15
Publisher Place United States
Journal Physics of Atomic Nuclei
Volume Number 80
Issue Number 4


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