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,
Tel (Office): (865) 574-6124 (FAX): (865) 574-1268
In the last two decades it has been demonstrated that light nuclei are described accurately as collections of particles interacting through the bare nucleon-nucleon potential and an additional three-body interaction. The result is a predictive ab initio theory of nuclear properties that should be applicable to many problems with minimal additional tuning or extrapolation difficulties, at least up to about mass 12. Widths of unbound nuclear levels and the asymptotic normalization coefficients (ANCs) or "virtual widths" that are their bound-state analogues have been mostly neglected in ab initio studies. These quantities can provide additional tests of the models, in many cases not yet probed by experiment, and they can be useful for the estimation of astrophysical cross sections. I will describe recent ab initio calculations of ANCs and widths using quantum Monte Carlo methods, present the results, and discuss the applicability of related techniques to future calculations of reaction and scattering cross sections.
Contact: (A. Galindo-Uribarri; 5746124)