Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-05-09
Nucl.Phys. A696 (2001) 371-395
Physics
Nuclear Physics
Nuclear Theory
19 pages, 6 figures
Scientific paper
10.1016/S0375-9474(01)01133-2
We formulate a continuum linear response theory on the basis of the Hartree-Fock-Bogoliubov formalism in the coordinate space representation in order to describe low-lying and high-lying collective excitations which couple to one-particle and two-particle continuum states. Numerical analysis is done for the neutron drip-line nucleus $^{24}$O. A low-lying collective mode that emerges above the continuum threshold with large neutron strength is analyzed. The collective state is sensitive to the density-dependence of the pairing. The present theory satisfies accurately the energy weighted sum rule. This is guaranteed by treating the pairing selfconsistently both in the static HFB and in the dynamical linear response equation.
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