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Physics and Astronomy

Physics & Astronomy Colloquium

3:30 PM, Friday, April 30, 2010
Room 155, Chem-Phys Building

Dr. Robert B. Wiringa
Physics Division
Argonne National Laboratory

"Nuclear Quantum Monte Carlo''

Ab-initio calculations of the structure of light nuclei, starting from "bare" two-nucleon interactions that fit NN scattering data, have become feasible over the last decade using quantum Monte Carlo methods. Three-nucleon interactions and two-body electroweak current operators are important additional inputs. Present variational and Green's function Monte Carlo methods allow us to study nuclei up to A=12 with unprecedented accuracy. Properties we can evaluate include binding and excitation energies, relative stability, the Nolen-Schiffer anomaly and isospin-mixing, one- and two-nucleon densities in configuration and momentum space, electromagnetic moments and electroweak transitions. We are also developing the tools for nucleon-nucleus scattering, with applications to electroweak capture reactions and parity-violation experiments.

Refreshments will be served in CP 179 at 3:15 PM