Energy dependent optical potential for reactions involving Li6,7 projectiles

Abstract

The dependence of the optical Cook potential on the bombarding energies of reactions involving $^{6,7}\mathrm{Li}$ projectiles has been analyzed. It has been found that, for reactions occurring close to or below the Coulomb barrier, the depth of the imaginary potential should be reduced from the value originally proposed by Cook in order to achieve better agreement with experimental elastic data. A modified version of the Cook potential is presented for both lithium isotopes, and its results are compared with those obtained using other existing optical potentials. Finally, the effects of the corrections made to the original Cook potential are studied in a one-neutron transfer case, highlighting the importance of using the correct optical potential for different reaction channels.