科研之友
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摘要
The excitation functions for the evaporation residues populated in the interaction of C-13+ Ho-165 system have been measured at projectile energies approximate to 4-7 MeV/nucleon. Stacked foil activation technique followed by off-line gamma-ray spectroscopy have been employed in the present work. The experimentally measured cross-sections are analyzed in the frame work of statistical model code PACE4, which takes into account only the complete fusion reaction cross-sections. The evaporation residues populated via xn and pxn channels were found to be in good agreement with the PACE4 predictions, while a significant enhancement in the measured cross-sections over PACE4 predictions is observed in case of alpha-emitting channels, which may be attributed to the incomplete fusion process. For the better understanding of incomplete fusion dynamics, the incomplete fusion fraction has also been deduced and its sensitivity with various entrance channel parameters like: projectile energy, mass-asymmetry, projectile structure in terms of Q(alpha)-value and Coulomb effect has been studied in the present work. The incomplete fusion fraction is found to increase with increasing the projectile energy and a strong projectile structure dependent mass-asymmetry systematic is also observed. The incomplete fusion fraction is also found to be small for more negative Q(alpha)-value projectile (C-13) induced reactions as compared to less negative Q(alpha)-value projectiles (C-12, O-160 and Ne-20) induced reactions with the same target nucleus Ho-165. An interesting trend is obtained on further investigation of incomplete fusion dependence on Coulomb effect (Z(p)Z(T)).
- 出版日期2018-2
