Charge transfer dynamics of carbon ions with uracil and halouracil targets at low collision energies

► Charge transfer cross sections at low energy for C4+ with uracil and halouracil collisions. ► Ab-initio calculations of potential energy curves and couplings. ► Comparison with calculations at keV energies. Anisotropy of the process. ► Interest with regard to action of radiations on the biological medium. ► Very few data on ion/biomolecule collisions at low energies.