Microscopic linear response calculations based on the Skyrme functional plus the pairing contribution

Details Microscopic linear response calculations based on the Skyrme functional plus the pairing contribution Microscopic linear response calculations based on the Skyrme functional plus the pairing contribution

2008-11-25

arxiv.org/abs/0811.4091v1

Phys.Rev.C78:064304,2008

Physics

Nuclear Physics

Nuclear Theory

Accepted for publication in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.78.064304

A self-consistent Quasiparticle-Random-Phase-Approximation (QRPA) model which employs the canonical Hartree-Fock-Bogoliubov (HFB) basis and an energy-density functional with a Skyrme mean field part and a density-dependent pairing, is used to study the monopole collective excitations of spherical even-even nuclei. The influence of the spurious state on the strength function of the isoscalar monopole excitations is clearly assessed. We compare the effect of different kinds of pairing forces (volume pairing, surface pairing and mixed pairing) on the monopole excitation strength function. The energy of the Isoscalar Giant Monopole Resonance (ISGMR), which is related to the nuclear incompressibility $K_{\infty}$, is calculated for tin isotopes and the results are discussed.

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