Influence of the transfer reactions on p + 6He elastic scattering.

We have studied an effect of neutron and triton transfer reactions on the p +^6He elasticscatteringat25 MeV bymeansofcoupled - reaction - channelcalculations. Itisfoundthatwhenthetransferreactionsareexplicitlyincludedinthecalculationstheimaginarypartoftheinput$ p + $6He optical model potential has to be reduced by 52 percent while its real part enhanced by 15 percent in order to fit the elastic-scattering data. The effect of transfer channels on the real part of this potential is somewhat weaker than that of 6He breakup reported previously. However, for the imaginary part, the effect of transfer channels is dominant. It is concluded that while the breakup contribution to proton elastic scattering mainly affects the real part of the bare potential, the contribution of transfer channels affects mainly its imaginary part. [ABSTRACT FROM AUTHOR]