Three-body Coulomb effects in the peripheral one-charged particle transfer reaction a + (bg) ® b + (ag)

When?

Tuesday 14 December 2010, 14:00

Where?

30 BB 03 Physics Seminar Room

Open to:

Students, Staff

Speaker:

Prof. R. Yarmukhamedov, Institute of Nuclear Physics, Uzbekistan Academy of Sciences,100214 Tashkent, Uzbekistan

Within the strict three-body (a,b and g) model, an influence of the three-body Coulomb effects on different forms of the DWBA amplitude for the peripheral one-charged particle transfer reaction a + (bg) ® b + (ag) being astrophysical interest is discussed.

It is shown that from the exact three-body distorted wave amplitude, the part can be separated in which the contribution of the three-body Coulomb dynamics in the transfer mechanism of the transition operator is taken into account correctly. Within the threebody approach combining the dispersion method and the DWBA approach, the result of estimation of contribution of the three-body Coulomb dynamics of the transfer mechanism to the peripheral partial wave amplitudes at l  » 1 for the concrete peripheral proton transfer reactions being astrophysical interest are presented. The way of the correct account of three-body Coulomb dynamics in the modified DWBA approach, which involves all possible subsequent Coulomb rescattering of three (a,b and g) particles in the transfer mechanism and results in the renormalization of the dominant peripheral partial amplitude, is considered. The peripheral transfer reaction with formation of the unbound resonant state for the residual nucleus (ag) is also discussed.