Physics & Astronomy Colloquium
3:30 PM, Friday, April 30, 2010
Room 155, Chem-Phys Building
Dr. Robert B. Wiringa
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