5.4 Determination of Eigenvalues in Gamow Shell Model: The Overlap Method
207
Run the Gamow shell model code with full spectrum diagonalization, but with
slightly different Berggren basis contours. Plot results similarly to Fig. 5.2.
Deduce that the energies and widths of pole states are independent of the used
contours, contrary to that of scattering eigenstates.
Fig. 5.2 Effects of small changes of the L + contour on the stability of the energies of resonance
and nonresonance 0 + states of the 20 O nucleus. Upper panel: the L + contour of complex momenta
corresponding to the d 3/2 continuum. The direction of deformation of the contour is indicated by
an arrow. Calculations have been effected for four contours discretized with ten points. Only the
two extremal contours are illustrated. Lower panel: Changes of the positions of the energies of the
states close to the three resonances in the vicinity of the two-neutron emission threshold in Fig. 5.1
(from Ref. [21])
207
Run the Gamow shell model code with full spectrum diagonalization, but with
slightly different Berggren basis contours. Plot results similarly to Fig. 5.2.
Deduce that the energies and widths of pole states are independent of the used
contours, contrary to that of scattering eigenstates.
Fig. 5.2 Effects of small changes of the L + contour on the stability of the energies of resonance
and nonresonance 0 + states of the 20 O nucleus. Upper panel: the L + contour of complex momenta
corresponding to the d 3/2 continuum. The direction of deformation of the contour is indicated by
an arrow. Calculations have been effected for four contours discretized with ten points. Only the
two extremal contours are illustrated. Lower panel: Changes of the positions of the energies of the
states close to the three resonances in the vicinity of the two-neutron emission threshold in Fig. 5.1
(from Ref. [21])