Two-dimensional simulation of a supernova explosion, A. Mezzacappa, UT/ORNL. UT has a strong theoretical and experimental effort in astrophysics with major emphasis on stellar explosions. The primary areas of interest are large-scale numerical simulation of core-collapse supernovae, neutrino transport in supernova explosions, simulation of novae and X-ray bursts, and neutron stars mergers and their relationship to gamma-ray bursts, and r-process element production. These programs involve extensive collaborations with the theoretical astrophysics group at Oak Ridge National Laboratory. The experimental effort in astrophysics centers on the new Holifield Radioactive Ion Beam Facility accelerator at Oak Ridge and concentrates on measurements of quantities important to the understanding of astrophysical phenomena such as novae, X-ray bursts, and supernovae. UT also hosts research in atomic physics that specializes in applications of atomic and molecular physics to astrophysics problems such as planetary atmospheres, supernova remnants, and formation of interstellar dust.