LABORATORI NAZIONALI DI LEGNARO
Understanding the couplings to nuclear intrinsic properties in fusion is important as they influence the barrier height and the formation probability of the compound nuclei, which in turn may be related to the synthesis of super heavy elements (SHEs) in heavier systems. In this content, the role of target deformation (static or dynamic) is well established, however, relative importance of coupling to the projectile excitation in the presence of significant target coupling is rarely available. As an approach to such study, the “barrier distribution” (BD) derived from quasi-elastic (QE) back-scattering has been studied for the 28Si+154Sm system. To measure the QE events, a set of hybrid telescope detectors has been fabricated at IUAC, New Delhi. We tried to understand the coupling not only by theoretical means (i.e. through coupled-channels calculation) but also by locating the effect of the coupling in the experimentally observed BD. The implications of the obtained results will be discussed in the heavier systems where deformed actinide targets are utilized for the production of SHEs. Apart from this, the results of our recent QE measurement for 48Ti+232Th system forming SHE, 280Cn112, will be discussed.

DATA: 08-09-2016