Abstract:
Excitation functions of reaction residues produced in the 14N + 169Tm system have been measured to high
precision at energies above the fusion barrier, ranging from 1.04VB to 1.30VB, and analyzed in the framework of
the statistical model code PACE4. Analysis of α-emitting channels points toward the onset of incomplete fusion
even at slightly above-barrier energies where complete fusion is supposed to be one of the dominant processes.
The onset and strength of incomplete fusion have been deduced and studied in terms of various entrance channel
parameters. Present results together with the reanalysis of existing data for various projectile-target combinations
conclusively suggest strong influence of projectile structure on the onset of incomplete fusion. Also, a strong
dependence on the Coulomb effect (ZPZT ) has been observed for the present system along with different
projectile-target combinations available in the literature. It is concluded that the fraction of incomplete fusion
linearly increases with ZPZT and is found to be more for larger ZPZT values, indicating significantly important
linear systematics.
