https://doi.org/10.1140/epja/s10050-024-01416-1
Regular Article - Experimental Physics
Investigating fusion–fission and quasifission in reaction populating 
Pt compound nucleus
1
Department of Physics, Kurukshetra University Kurukshetra, 136119, Haryana, India
2
Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, 700064, Kolkata, India
3
Inter University Accelerator Centre, Aruna Asaf Ali Marg, 110067, New Delhi, India
4
Department of Physics, Panjab University, 160014, Chandigarh, India
5
Department of Nuclear Physics, Andhra University, 530003, Visakhapatnam, India
6
Centre for Radio Ecology and Department of Physics, Guru Jambeshwar University of Science and Technology, 125001, Hisar, India
7
Department of Physics and Astrophysics, Central University of Haryana, 123032, Mahendergarh, India
8
Institute of Physics, University of Szczecin, Wielkopolska 15, 70-451, Szczecin, Poland
9
Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India
10
Department of Physics, Thapar University, 147004, Patiala, Punjab, India
11
Department of Physic, M. S. University of Baroda, 390002, Vadodara, Gujarat, India
Received:
17
May
2024
Accepted:
5
September
2024
Published online:
7
October
2024
Fission dynamics of Pt, a neutron deficient nucleus in newly discovered mass asymmetric sub-Pb region, have been explored via fission fragments mass-angle and mass-total kinetic energy distributions, at energies around and above the barrier. The observed correlations of fragment mass and emission angle indicate the presence of fission events originating from a non-equilibrated source. Mass-total kinetic energy spectra are relatively broader and the dependence of measured mean total-kinetic-energy on fragment mass is also broader than the expected parabolic dependence for liquid drop fission behaviour, at all studied energies. The measured mean total kinetic energy values are higher than the prediction of Viola systematics. The widths of measured total kinetic energy distributions are also inconsistent with the observed systematic behaviour of compound nucleus (CN) in this mass region. These observation of mass-angle and mass-total kinetic energy distributions revealed the clear signatures of the presence of slow quasifission in the fission of Pt compound nucleus. These findings indicate the role of entrance channel parameters such as mass asymmetry and charge product 
in Fusion-Fission and quasi-fission dynamics. Dynamical model calculations do not predict the presence of quasi-fission for the present reaction system.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. 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.
