Systematics for low energy incomplete fusion: Still a puzzle?

¹ NP Group: Inter-University Accelerator Centre, New Delhi - 110 067, India
² Phys. Dept, Aligarh Muslim University, Aligarh - 202 002, U.P., India
³ Phys. Dept., Univ. of Petro. & Energy Studies, Dehradoon - 248007, India
⁴ Phys. Dept., Indian Institute of Technology Ropar, Ropar - 140 001, India
⁵ Dept. of Phys. & Astrophys, University of Delhi, Delhi - 110007, India
⁶ Phys. Dept, S. V. College, Aligarh - 202 001, U. P., India

Published online: 11 May 2016

Abstract

In order to have a better and clear picture of incomplete fusion reactions at energies ≈4-7MeV/nucleon, the excitation function measurements have been performed for ¹⁸O+¹⁵⁹Tb system. The experimental data have been analyzed within the framework of compound nucleus decay. The cross-section for xn/pxn-channels are found to be well reproduced by PACE4 predictions, which suggest their production via complete fusion process. However, a significant enhancement in the excitation functions of α-emitting channels has been observed over the theoretical ones, which has been attributed due to the incomplete fusion processes. The incomplete fusion fractions have been deduced at each studied energy and compared with other nearby systems for better insight into the underlying dynamics. The incomplete fusion fraction has been found to be sensitive to the projectile’s energy and α-Q-value.