Evidence of narrow range high spin population in incomplete fusion∗

Abstract

Particle (p, α)–γ-coincidence experiment has been performed to probe incomplete fusion dynamics in the 12C+169Tm system at 5–7.5 MeV/A. Spin distributions of different reaction products populated via xn and α/2αxn channels have been measured to acquire information about the involved reaction mechanism on the basis of their experimentally observed de-excitation patterns. The spin distributions of direct-α (incomplete fusion) and fusion–evaporation (complete fusion) channels are found to be distinct from each other, substantiating their origin in entirely different reaction dynamics. It has been found that CF products span a broad spin range, while ICF products are confined to a narrow spin range localized in the higher spin states. Findings of the present work comprehensively demonstrate that incomplete fusion reactions can be used as a sensitive tool to populate high-spin states in final reaction products, which are not otherwise accessible.