Abstract
The fluctuation properties of energy spectrum, electromagnetic transition intensities and electromagnetic moments in Xe 136 nucleus are investigated within the framework of the interacting shell model, using a realistic effective interaction for the N82-model space with a Sn 132 core. The spectral fluctuations (i.e., the nearest-neighbors level spacing distribution and the Δ 3 statistic), the distributions of the electromagnetic transition intensities and of the electromagnetic moments are well described by the Gaussian orthogonal ensemble of random matrices. A clear quantum signature of the breaking of chaoticity (i.e., a transition towards regularity) is observed when the single particle energies are increased.
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