Nuclear deformation in the configuration-interaction shell model

Projected shell model for nuclear structure and weak interaction rates

The knowledge on stellar weak interaction processes is one of the most important ingredients for resolving astrophysical questions. Study of these rates is essentially a nuclear structure problem, in which the actual decay rates are determined by the microscopic inside of nuclear many-body systems. For many astrophysically-interested questions, information on detailed nuclear level structure at...

Beyond the nuclear shell model

© 2007 American Institute of Physics, S-0031-9228-0711-030-9 Nuclei, the fuel that burns in stars, make up 99.9% of all baryonic matter in the universe.1 The complex nature of the nuclear forces among protons and neutrons generates a broad range and diversity of nuclear phenomena. Developing a comprehensive description of nuclei and their reactions represents one of the great intellectual oppor...

Nuclear shell structure and chaotic dynamics in hexadecapole deformation.

The effect of an axially symmetric hexadecapole term is investigated in a strongly deformed quadrupole potential. While the system is nonintegrable and shows significant chaotic behaviour classically, the quantum mechanical treatment not only produces a general smoothing effect with regard to chaos but even yields a pronounced shell structure at certain hexadecapole strength parameter values fo...

Mixed Symmetry Nuclear Shell Model

A mixed-symmetry nuclear shell-model scheme for carrying out calculations in regimes where there is a competition between two or more modes is proposed. A one-dimensional toy model is used to demonstrate the concept. The theory is then applied to 24Mg and 44T i. For lower pf -shell nuclei such as 44−48T i and 48Cr there is strong SU(3) symmetry breaking due to the spin-orbit interaction. Howeve...

Effective Interactions for the Nuclear Shell Model