Quasi-elastic Scattering of 19F+208Pb Systemat Near-and Sub-barrier Energies
- Received Date: 1900-01-01
- Accepted Date: 1900-01-01
- Available Online: 1997-10-05
Abstract: The quasi-elastic scattering angular distributions of 19F+208Pb system at energies of 88,91,93,96 and 102 MeV have been measured by means of ionization chamber △E-E telescope. The optical potential parameters of the system were obtained from the fit of the angular distributions of the elastic scattering with ECIS code, and the phenomenon of the " threshold anomaly" is clearly observed. The angular distributions and the excitation functions of the products C, N and O from transfer reactions were also obtained. The slope factor k were deduced from the relations between the transfer probabilities and the closest distances for three main transfer channels. The κ values agree with the semi-classical calculation for the single nucleon transfer reaction, but are smaller than the calculation for the mufti-nucleon transfer reactions, and depend on theincident energies. The "slope anomaly. and the energy dependence of κ can not be explained by the semiclassical theory.