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 24, 2014, at 3:00 p.m. - 4:00 p.m. (refreshments at 2:40 p.m.)

Mean-Field Dynamics for Giant Resonances and Fusion Reactions

Paul D. Stevenson, University of Surrey, United Kingdom
ORNL, Bldg. 6008 Large Conference Room

The energy density functional view of nuclei provides a good description of ground state properites and is linked to the underlying nuclear interactions via the Hartree-Fock (HF) approximation. The extension of HF to dynamical processes via the time-depdendent HF approach allows description of collective nuclear behaviour, including giant resonances and collisions.

We present a survey of some recent results with time-dependent approaches; Various properties of giant-resnonace-like modes are explored, including low-lying dipole strength in Se-76 [1], in which a non-multipole excitation is used to pick out "pygmy" strength; Some technical advances leading to a true continuum theory [2]; Results in giant resonances and fusion from exploring tensor terms in the nuclear interaction [3,4].

Some details of a newly-published code allowing such calculations to be performed will also be presented [5].

[1] P. M. Goddard et al., Phys. Rev. C 88, 064308 (2013).
[2] C. I. Pardi and P. D. Stevenson, Phys. Rev. C. 87, 014330 (2013).
[3] S. Fracasso, P. D. Stevenson and E. B. Suckling, Phys. Rev. C 86, 044303 (2012).
[4] P. D. Stevenson, Sara Fracasso and E. B. Suckling, J. Phys. Conf. Ser. 381, 012105 (2012).
[5] J. A. Maruhn, P.-G. Reinhard, P. D. Stevenson and A. S. Umar, accepted for publication in Computer Physics Communications, arXiv:1310.5946.

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