Pairing correlation involving the continuum states
Naoki Tajima
Abstract
The Hartree-Fock-Bogoliubov equation for the ground states of even-even atomic nuclei is solved using the canonical representation in the coordinate space for zero range interactions like the Skyrme force. The gradient method is improved for faster convergence to the solutions under constraint of orthogonality between canonical orbitals. Necessity of the cut-off of the pairing interaction is shown even when the number of the canonical orbitals are restricted. A repulsive dependence of the interaction on the pairing density is introduced as an implementation of the cut-off which leaves the HFB super matrix state-independent.
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