Seminarium fizyki jądra atomowego
Dnia 31 października 2003 odbyło się seminarium pt.
„Sub-barrier and near barrier fusion of halo nuclei”
prelegent: dr Nicolas Alamanos (CEA/Dapnia/SPhN Saclay, Francja)
Streszczenie: Results of near-and sub-barrier fusion of light unstable nuclei, 6He+209Bi, 6He+238U and 11Be+209Bi will be presented and compared with results for the respective stable isotopes 4He+209Bi, 4He+238U and 9Be+209Bi. The experimental data are compared with coupled channel calculations. In this theoretical framework, the fusion of the systems 4He+209Bi, 4He+238U and 9Be+209Bi is reproduced without adjustable parameters. For the weakly bound halo systems, a rather satisfactory description of the data can be obtained under the condition that the real part of the optical potential has to be reduced. The origin of this reduction will be discussed.