Abstract
We study the fluctuation properties of electromagnetic transition intensities and electromagnetic moments in nuclei within the framework of the interacting shell model, using a realistic effective interaction for -shell nuclei with a core. The distributions of the transition intensities and of the electromagnetic moments are well described by the Gaussian orthogonal ensemble of random matrices. In particular, the transition intensity distributions follow a Porter-Thomas distribution. When diagonal matrix elements (i.e., moments) are included in the analysis of transition intensities, the distributions remain Porter-Thomas except for the isoscalar This deviation is explained in terms of the structure of the isoscalar operator.
- Received 6 September 2000
DOI:https://doi.org/10.1103/PhysRevC.65.064311
©2002 American Physical Society