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., April 05, 2012, at 3 pm (refreshments at 2:40pm)

Nuclear data for the r-process: what should we measure?

Rebecca A. Surman, Union College
Building 6008 Conference Room

While we know the heaviest nuclei in the galaxy are made via rapid neutron capture, or r-process, nucleosynthesis, exactly where (and how) the r-process occurs is still not understood. Progress toward answering these questions involves nuclear network simulations of the r-process, which require nuclear physics information for thousands of neutron-rich nuclei from the line of stability to the neutron drip line. Only very few of these pieces of nuclear data have been measured experimentally, and, even with the development of the next generation of radioactive beam facilities, we will never be able to measure all of the data we need. It is therefore imperative to determine which nuclear properties are most crucial for r-process simulations. Here we report on recent r-process sensitivity studies that examine the roles of individual pieces of nuclear data---neutron separation energies, beta decay rates, and neutron capture rates---in shaping the final r-process abundance distribution.