Monopole Giant Resonances and TDHF boundary conditions

Abstract

Using time-dependent Hartree-Fock, we induce isoscalar and isovector monopole vibrations and follow the subsequent vibrations of both the same and opposite isospin nature in the N ≠ Z nucleus 132Sn. By suitable scaling of the proton and neutron parts of the excitation operators, the coupling between the modes is studied, and the approximate normal modes found. Chaotic dynamics are then analysed in the isoscalar giant monopole resonance by using reflecting boundaries in a large space to build up a large number of 0+ states whose spacings are then analysed. A Wigner-like distribution is found. © 2007 Elsevier B.V. All rights reserved.