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

Fri., December 15, 2006, at 10:00 a.m. (refreshments at 9:40 a.m.)

Proximity Decay of Unstable Nuclear Clusters

Romualdo De Souza, Indiana University
Building 6025 Conference Room

Emisson of clusters from excited heavy nuclei is well described as a statistical process. Clusters are emitted both in their ground state as well as in excited states. When the cluster is short-lived (e.g., 8Be*) it decays in the proximity of the emitting nucleus. This proximity decay is clearly observed in the relative kinetic energy of the daughter fragments as a tidal effect. Such decays manifest both the Coulomb interaction with the residual heavy nucleus, as well as a nuclear proximity interaction. Initial observations of proximity decay will be described and what can be learned from such decays will be discussed.