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., September 01, 2011, at 3:00 p.m. (refreshments at 2:40 p.m.)

Two-proton decay in light nuclei

Robert Charity, Washington University, St. Louis, MO
Building 6008 Conference Room

Two-proton and higher order decays of light proton-rich nuclei are discussed using data from recent experiments with the High Resolution Si Array where all the decay products are detected. Data from 6Be ground-state decay are compared to the three-body model of Grigorenko. This decay is a test case for three-body models as it is the lightest case of two-proton decay, and the alpha-particle core simplifies the theory as core excitations should be minimal. In addition a number of more exotic decays are presented; 8C is shown to decay by two sequential steps of two-proton decay, the isobaric state in 8B two-proton decays to the isobaric state of 6Li, and a four-body decay of an excited state in 10C is demonstrated. All told, these examples demonstrate that two-proton decay is an exciting field at the moment.