1,887 research outputs found
Hartree-Fock-Bogoliubov Calculations in Coordinate Space: Neutron-Rich Sulfur, Zirconium, Cerium, and Samarium Isotopes
Using the Hartree-Fock-Bogoliubov (HFB) mean field theory in coordinate
space, we investigate ground state properties of the sulfur isotopes from the
line of stability up to the two-neutron dripline (). In particular,
we calculate two-neutron separation energies, quadrupole moments, and rms-radii
for protons and neutrons. Evidence for shape coexistence is found in the very
neutron-rich sulfur isotopes. We compare our calculations with results from
relativistic mean field theory and with available experimental data. We also
study the properties of neutron-rich zirconium (), cerium
(), and samarium () isotopes which exhibit very large
prolate quadrupole deformations.Comment: 7 pages, 6 figures, 2 tables submitted to Phys. Rev.
Ni+Ni fusion reaction calculated with the density-constrained time-dependent Hartree-Fock formalism
We study fusion reactions of the Ni+Ni system using the
density-constrained time-dependent Hartree-Fock (TDHF) formalism. In this
formalism the fusion barriers are directly obtained from TDHF dynamics. In
addition, we incorporate the entrance channel alignments of the slightly
deformed (oblate) Ni nuclei due to dynamical Coulomb excitation. We show
that alignment leads to a fusion barrier distribution and alters the naive
picture for defining which energies are actually sub-barrier. We also show that
core polarization effects could play a significant role in fusion cross section
calculations.Comment: 7 pages, 6 figure
Time-Dependent Response Calculations of Nuclear Resonances
A new alternate method for evaluating linear response theory is formally
developed, and results are presented. This method involves the time-evolution
of the system using TDHF and is constructed directly on top of a static
Hartree-Fock calculation. By Fourier transforming the time-dependent result the
response function and the total probability amplitude are extracted. This
method allows for a coherent description of static properties of nuclei, such
as binding energies and deformations, while also providing a method for
calculating collective modes and reaction rates. A full 3-D Cartesian
Basis-Spline collocation representation is used with several Skyrme
interactions. Sample results are presented for the giant multipole resonances
of 16O, 40Ca, and 32S and compared to other calculations.Comment: 8 pages, 7 figures, submitted to Phys. Rev.
Compressibility and equation of state of finite nuclei
We present a new approach for calculating the nuclear equation of state and
compressibility for finite nuclei using the density-constrained Hartree-Fock
method.Comment: 4 pages, 3 figure
Density-constrained time-dependent Hartree-Fock calculation of O+Pb fusion cross sections
We present a fully microscopic study of the O+Pb fusion using
the density-constrained time-dependent Hartree-Fock theory. The calculated
fusion cross-sections are in good agreement with the experimental data for the
entire energy range indicating that the incorporation of dynamical effects is
crucial in describing heavy-ion fusion.Comment: 5 pages, 3 figure
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