https://doi.org/10.1051/epjconf/201716300054
Effect of projectile on incomplete fusion reactions at low energies
1
NP-Group, Inter University Accelerator Centre, New Delhi - 110 067, India
2
Department of Physics, Aligarh Muslim University, Aligarh 202 002, India
3
Department of Physics, Indian Institute of Technology Ropar, Punjab 140 001, India
4
Physics Department, S. V. College, Aligarh - 202 001, India
5
Department of Physics, University of Petroleum and Energy Studies, Dehradun - 248 007, India
* e-mail: phy.vijayraj@gmail.com
** e-mail: bpsinghamu@gmail.com
Published online: 22 November 2017
Present work deals with the experimental studies of incomplete fusion reaction dynamics at energies as low as ≈ 4 - 7 MeV/A. Excitation functions populated via complete fusion and/or incomplete fusion processes in 12C+175Lu, and 13C+169Tm systems have been measured within the framework of PACE4 code. Data of excitation function measurements on comparison with different projectile-target combinations suggest the existence of ICF even at slightly above barrier energies where complete fusion (CF) is supposed to be the sole contributor, and further demonstrates strong projectile structure dependence of ICF. The incomplete fusion strength functions for 12C+175Lu, and 13C+169Tm systems are analyzed as a function of various physical parameters at a constant vrel ≈ 0.053c. It has been found that one neutron (1n) excess projectile 13C (as compared to 12C) results in less incomplete fusion contribution due to its relatively large negative α-Q-value, hence, α Q-value seems to be a reliable parameter to understand the ICF dynamics at low energies. In order to explore the reaction modes on the basis of their entry state spin population, the spin distribution of residues populated via CF and/or ICF in 16O+159Tb system has been done using particle-γ coincidence technique. CF-α and ICF-α channels have been identified from backward (B) and forward (F) α-gated γspectra, respectively. Reaction dependent decay patterns have been observed in different α emitting channels. The CF channels are found to be fed over a broad spin range, however, ICF-α channels was observed only for high-spin states. Further, the existence of incomplete fusion at low bombarding energies indicates the possibility to populate high spin states
© The Authors, published by EDP Sciences, 2017
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