Dominance of JP=0+ ground states in even-even nuclei from random two-body interactions
Abstract
Recent calculations using random two-body interactions showed a preponderance of JP=0+ ground states, despite the fact that there is no strong pairing character in the force. We carry out an analysis of a system of identical particles occupying orbits with j=1/2, 3/2, and 5/2 and discuss some general features of the spectra derived from random two-body interactions. We show that for random two-body interactions that are not time-reversal invariant the dominance of 0+ states in this case is more pronounced, indicating that time-reversal invariance cannot be the origin of the 0+ dominance.
- Publication:
-
Physical Review C
- Pub Date:
- August 1999
- DOI:
- arXiv:
- arXiv:nucl-th/9906046
- Bibcode:
- 1999PhRvC..60b1302B
- Keywords:
-
- 05.30.-d;
- 05.45.-a;
- 21.60.Cs;
- 24.60.Lz;
- Quantum statistical mechanics;
- Nonlinear dynamics and chaos;
- Shell model;
- Chaos in nuclear systems;
- Nuclear Theory;
- Nonlinear Sciences - Chaotic Dynamics
- E-Print:
- 8 pages, 3 tables and 3 figures. Phys. Rev. C, in press