Fission barriers in neutron-proton isospin plane for heavy neutron-rich nuclei

Abstract

We discuss the sensitivity of fission barrier for heavy neutron-rich nuclei to fission paths in the two dimensional neutron-proton quadrupole plane. To this end, we use the constrained Skyrme-Hartree-Fock + BCS method, and examine the difference of fission barriers obtained with three constraining operators, that is, the neutron, proton, and mass quadrupole operators. We investigate ${}^{220}$U, ${}^{236}$U, and ${}^{266}$U, %from proton-rich to neutron-rich uranium isotopes, that is relevant to r-process nucleosynthesis. We find that the fission barrier heights are almost the same among the three constraining operators even for neutron-rich nuclei, indicating that the usual way to calculate fission barriers with the mass quadrupole operator is well justified. We also discuss the difference between proton and neutron deformation parameters along the fission paths.

arXiv comment6 pages, 7 figures

References in corpus (10)

• Shape Coexistence and the Effective Nucleon-Nucleon Interaction
• Selfconsistent calculations of fission barriers in the Fm region
• Five-Dimensional Fission-Barrier Calulations from Se-70 to Cf-252
• Systematics of Fission Barriers in Superheavy Elements
• Calculations of fission rates for r-process nucleosynthesis
• Deformation parameter for diffuse density
• Fission Cycling in Supernova Nucleosynthesis: Active-Sterile Neutrino Oscillations
• Neutrino-induced fission of neutron-rich nuclei
• Effect of differences in proton and neutron density distributions on fission barriers
• Large-amplitude Qn-Qp collectivity in the neutron-rich oxygen isotope 20O

Cited by in corpus (3)

• The impact of individual nuclear properties on $r$-process nucleosynthesis
• Systematic Study of Fission Barriers of Excited Superheavy Nuclei
• Fission of heavy $\Lambda$ hypernuclei with the Skyrme-Hartree-Fock approach