Pairing Vibrations Study with the Time-Dependent Hartree-Fock-Bogoliubov theory

Details Pairing Vibrations Study with the Time-Dependent Hartree-Fock-Bogoliubov theory Pairing Vibrations Study with the Time-Dependent Hartree-Fock-Bogoliubov theory

2008-08-26

arxiv.org/abs/0808.3507v2

Phys.Rev.C78:044318,2008

Physics

Nuclear Physics

Nuclear Theory

accepted for publication in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.78.044318

We study pairing vibrations in $^{18,20,22}$O and $^{42,44,46}$Ca nuclei solving the time-dependent Hartree-Fock-Bogoliubov equation in coordinate space with spherical symmetry. We use the SLy4 Skyrme functional in the normal part of the energy density functional and a local density dependent functional in its pairing part. Pairing vibrations are excited by two-neutron transfer operators. Strength distributions are obtained using the Fourier transform of the time-dependent response of two-neutron pair-transfer observables in the linear regime. Results are in overall agreement with quasiparticle random phase approximation calculations for Oxygen isotopes, though differences appear when increasing the neutron number. Both low lying pairing modes and giant pairing vibrations (GPV) are discussed. The GPV is observed in the Oxygen but not in the Calcium isotopes.

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