Phys.Rev. C 100, 044308 (2019)

B.Bally, A.Sanchez-Fernandez, T.R.Rodriguez

Variational approximations to exact solutions in shell-model valence spaces: Calcium isotopes in the pf shell

NUCLEAR STRUCTURE ⁴⁸Ca; calculated total energy surfaces (TES) as a function of the quadrupole degrees of freedom in the (β₂, γ) plane, intrinsic pairing energy, particle-number projected, and particle-number and angular-momentum projected total energy surfaces as a function of the axial quadrupole (β₂, γ=0 or 180 degrees) and nn-pairing degrees of freedom, levels, J, π, wave functions, B(E2), spectroscopic electric quadrupole moments, occupation numbers. ^{42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60}Ca; calculated ground-state energies, energy difference between the approximate and exact ground-state energies computed with different variational approaches, excitation energies as a function of the angular momentum. Calculations used several projected generator coordinate methods (PGCM) in reproducing the exact eigenstates of the shell-model Hamiltonian KB3G in the pf-shell valence space.

doi: 10.1103/PhysRevC.100.044308