Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268

Thu., August 29, 2013, at 3:00-4:00 PM (refreshment served at 2:40 PM)

Nuclear Messengers: Probing Stellar Models Through Microphysics

Michael G. Bertolli, Los Alamos National Laboratory, Los Alamos, NM
ORNL, Bldg. 6008 Large Conference Room

Astronomers and astrophysicists are interested in a more detailed study of supernova, and LANL is a leader in this effort. With extensive data available on supernova remnants we have unique and growing opportunities to study the microphysics behind these explosions. The physics of these explosions provide information about nucleosynthetic yields, which can discriminate between competing supernova models, and constrain the initial supernova progenitor. However, the application of nuclear data uncertainty analysis to astrophysics is limited to select sensitivity studies with simplistic methods of uncertainty propagation, and employed rates are often outdated. Recent work at LANL utilizing the nuclear data evaluation has led to full nuclear reaction rate uncertainty studies within the NuGrid nucleosynthesis code. These initial studies highlight the importance of full uncertainty studies, and provide a new avenue in microphysics studies of stellar processes.

Contact: Alfredo Galindo-Uribarri, (865) 574-6124