A3F-CNS Summer School 2020

Study of complete-incomplete fusion mechanisms in 7Li+89Y reaction.

19 Aug 2020, 16:20

15m

Young Scientist Session 3

Speaker

Mr Rinku Prajapat (Department of Physics, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India)

Description

Fusion mechanism of weakly bound stable (${}^{6,7}$Li and ${}^9$Be) and unstable halo (${}^{11}$Li, ${}^{7,11}$Be, and ${}^8$B) nuclei is a subject of great interest from the past few years [1,2]. Due to their low breakup threshold, various reaction processes like complete-incomplete fusion (CF-ICF), elastic breakup, and transfer followed by a breakup, appear in the reaction dynamics. Hence, to study the CF-ICF mechanisms and its dependency on entrance channel parameters in ${}^7$Li+${}^{89}$Y reaction an experiment was performed at the BARC-TIFR Pelletron facility Mumbai, India, using activation technique within the 2.7–5.7 MeV/nucleon energy range. The γ-spectrometry has been used to identify the residues and residual cross-sections have been measured. A systematic analysis of the complete and incomplete fusion dynamics has been carried out by comparing the measured excitation functions with the equilibrium and pre-equilibrium reaction models in the framework of statistical reaction codes EMPIRE3.2.2 and ALICE19. A strong indication of incomplete fusion has been realized within the energy range considered; hence the strength of incomplete fusion fraction (F${}_{ICF}$) has been deduced. F${}_{ICF}$ shows an increasing trend with increasing projectile energy [3]. Further, barrier height and radius parameters extracted from the measured data are in good agreement with the Bass model.

References:
[1] L. F. Canto et al., Phys. Rep. 596, 1 (2015).
[2] R. Prajapat and M. Maiti, Phys. Rev. C 101, 064620 (2020).
[3] R. Prajapat and M. Maiti, Phys. Rev. C 101, 024608 (2020).