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

Journal Article · Tue Apr 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.044308· OSTI ID:21189905

Minato, F; Hagino, K ^[1]

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1. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)

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 {sup 220}U, {sup 236}U, and {sup 266}U, 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.

• OSTI ID: 21189905
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 77, Issue 4; Other Information: DOI: 10.1103/PhysRevC.77.044308; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BCS THEORY
DEFORMATION
FISSION
FISSION BARRIER
HARTREE-FOCK METHOD
HEAVY NUCLEI
ISOSPIN
MASS
NEUTRON-RICH ISOTOPES
NEUTRONS
NUCLEOSYNTHESIS
PROTONS
QUADRUPOLES
QUANTUM OPERATORS
R PROCESS
SENSITIVITY
SKYRME POTENTIAL
TWO-DIMENSIONAL CALCULATIONS
URANIUM 236
URANIUM ISOTOPES