https://doi.org/10.1140/epjp/s13360-022-03411-1
Regular Article
Study of fusion–fission dynamics in 12C + 197Au system
Department of Physics, Indian Institute of Technology Roorkee, 247667, Roorkee, Uttarakhand, India
Received:
29
May
2022
Accepted:
19
October
2022
Published online:
29
November
2022
A massive compound nucleus (CN) usually deexcites through light particle evaporation and fission. Scarcity available in the study of fusion–fission (FF) dynamics for the preactinide region nuclei pushed us to explore the reaction involving the fusion of 12C with the 197Au target at energies within 3.7–6.1 MeV/nucleon. After the bombardment, residues produced in each Au target were identified using the off-beam γ–ray spectroscopy method. Consequently, 10 evaporation residues (ERs) and 9 fission fragments within 85 ≤ A ≤ 167 mass range, formed by complete fusion (CF)/incomplete fusion (ICF), have been confirmed through the activity measurements. pace4 and empire3.2.2 reaction model codes were employed to analyze the measured cross sections of ERs, out of which pace4 estimations were found to show relatively better agreement. The comparisons between measured and theoretical excitation functions ensured the absence of pre-compound processes within the studied energy range. At the same time, model-dependent calculations estimated 8.7% ICF strength at 72 MeV energy. Further, to get better insight into the dynamics, the mass distribution of fission fragments was examined. Broad and symmetric mass distribution observed through the Gaussian fitting gave evidence of the production of fission fragments through a compound nuclear mechanism. Also, the trend of mass variance with changing entrance channel parameters, precisely mass asymmetry, was examined. As a result, an almost linear increment of mass variance with an increasing value of mass asymmetry was spotted.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
