Dominance of JP=0+ ground states in even-even nuclei from random two-body interactions -: art. no. 021302

Recent calculations using random two-body interactions showed a preponderance of J(P) = 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. [S0556-2813(99)50608-0].