Selecting cold 2n transfer in Dy-162(Sn-116,Sn-118)Dy-160

Cold 2n transfer has been studied using the reaction Dy-162(Sn-116,Sn-118)D y-160 at energies in the vicinity of the Coulomb barrier. The experiment wa s performed at the Heidelberg-Darmstadt Crystal Ball spectrometer which was extended by 6 Compton suppressed Ge-detectors. It is demonstrated, that th e direct population of intrinsically cold states in the deformed Dy-160 tra nsfer product can be selected by identifying and suppressing excitations to states above the yrast line using the Crystal Ball. The probability for po pulating yrast states in the deformed Dy-160 nuclei in a 2n transfer reacti on increases from 7 % at grazing collisions up to approximate to 50 % at la rge impact parameters, while the probability for populating the ground stat e in the spherical 2n transfer product Sn-118 stays about constant at appro ximate to 45 % for all measured impact parameters.