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., February 19, 2009, at 3:00 p.m. (refreshments at 2:40 p.m.)

Study of He radiative capture of astrophysical interest at Notre Dame

Manoel Couder, Joint Institute for Nuclear Astrophysics (JINA), University of Notre Dame
Building 6008 Conference Room

Radiative captures of hydrogen and helium at low energy play a role in most nuclear astrophysics scenarios. Studying such reactions is part of the nuclear astrophysics program at the University of Notre Dame. Direct and indirect methods are exploited in direct kinematics.

While the study of a number of radiative capture reactions involving stable beams was possible in direct kinematics, the very small cross section of these reactions at astrophysically interesting energies and the beam induced background limit the possible range of many other measurements. This justifies the development of a new facility for measuring cross sections of radiative 4He capture in reverse kinematics with stable beams. A 20-m long recoil mass separator (RMS) has been designed to be coupled to the KN accelerator of the University of Notre Dame. The goal of the RMS is to separate low mass (A<=40), low energy (E<0.5 MeV/A) stable beams of up to 100 microA from the few reaction products emerging from a windowless 4He jet gas target.