Dynamical decay of 32S* and 31P* formed in 20Ne+12C and 19F+12C reactions, respectively, at E*CN = 60 MeV
1 Department of Physics, Sri Guru Granth Sahib World University, Fatehgarh Sahib - 140406, India
2 School of Physics and Materials Science, Thapar University, Patiala - 147004, India
3 Department of Physics, Panjab University, Chandigarh - 160014, India
a e-mail: firstname.lastname@example.org
Published online: 29 January 2015
The target-like C-yield in the decay of compound systems 32S* and 31P* formed in 20Ne+12C and 19F+12C reactions at E*CN=60 MeV, is studied for the contribution of fusion-fission (ff) decay cross section σff and the deep inelastic (DI) orbiting σorb from the compound nucleus (CN) and non-compound nucleus nCN processes, respectively. The calculations are performed using the collective clusterization of fragments within the dynamical cluster-decay model (DCM) of Gupta and collaborators. Besides studying the competition between ff and DI orbiting phenomenon in the C-yield of these systems, we exclusively investigate the preformation and barrier penetration probabilities P0 and P as a function of angular momentum ℓ values which subsequently affects the contributions of σff and σorb. For calculating the contribution of σff in the C-yield, we have added the contributions from all the minimized intermediate mass fragments (IMFs) for Z=6 in the calculated fragmentation potentials for 32S* (IMFs 11,12,13C are minimized) and for 31P* (IMFs 12,13C are minimized), while calculating subsequently, P0 and the P for these IMFs. The distribution of preformed clusters/fragments as a function of fragment mass visibly explore the nuclear structure effects for the C-yield in decay of these compound systems, wherein, it is shown to be more favoured in the decay of 31P* in comparison to 32S* decay. The contribution of σorb to the C-yield is calculated from P at different allowed ℓ-values (upto ℓmax and also P≤1) of the outgoing fragments (same as that in the entrance channel, i.e., P0=1). Though preliminary but useful results indicates the competition between the CN and nCN process in the C-yield for the compound system 32S* only while the decay of 31P* is of pure CN origin, as observed in the experimental study. The calculations are in good comparison with the available experimental data.
© Owned by the authors, published by EDP Sciences, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.