Abstract:
In order to study incomplete fusion (ICF) reaction dynamics, the present work manifests the role of a non-αcluster 14N projectile on 181Ta target at energies ≈4–7 MeV/nucleon using the offline γ -ray spectroscopy. The
excitation functions for 15 reaction residues populated in 14N + 181Ta system have been measured and analyzed
within the framework of statistical model code PACE4. The experimentally measured excitation functions of
evaporation residues populated via xn/pxn channels are found to be well reproduced by the predictions of code
PACE4, which confirms their production solely via complete fusion process. However, an enhancement in the
measured excitation function as compared to PACE4 calculations, particularly in tail portion of 192Hg residue (3n
channel) has been observed indicating the presence of precompound emission. A significant contribution from
precursor decay in pxn channels has also been observed. An enhancement in the measured excitation functions
for α-emitting channels as compared to the PACE4 predictions has been observed and attributed to the incomplete
fusion process. Further, the contribution from incomplete fusion process in the 14N + 181Ta system has also been
deduced in terms of strength function (FICF). The results have been discussed in terms of the parameters which
influence the dynamics of ICF process. The FICF is found to depend strongly on projectile energies, the product
of projectile and target charges, and α-Q value of the projectile.
