Moreno, O | Search NASA

DOE OSTI2011

Selected Topics on Nuclear Structure in Rare Electroweak Processes

We analyze the active-shell occupation probabilities of {sup 76}Ge and their contribution to the single- and double-beta decay matrix elements of this isotope. Strength modifications of the nucleon spin-orbit interaction are introduced for a better comparison with experimental data. The relation of this spin-orbit interaction with the nucleon densities is explored, and the latter are analyzed for {sup 76}Ge in the context of parity-violating electron scattering as a tool to extract accurate experimental information on neutron distributions.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗

DOE OSTI2011

Selected Topics on Nuclear Structure in Electroweak Processes

We study electroweak processes in complex nuclei within the framework of self-consistent mean field theories including pairing and RPA correlations. We review the adiabatic time dependent Hartree-Fock (HF) theory and its ability to simultaneously handle large and small amplitude modes. We apply the formalism to the study of single and double beta decay as normal modes of the system, allowing for collective deformation, using Skyrme density-dependent two-body interactions. We also apply the formalism to the study of parity-violating electron scattering. We highlight nuclear structure issues that are crucial for the correct analysis of these processes, namely neutron densities and spectroscopic factors, whose proper knowledge and interpretation in stable nuclei is required to get reliable predictions on exotic nuclei.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗